Did you know that New Zealand is home to some of the most unique native trees on the planet, with around 80% of its forest species found nowhere else? These NZ native trees play a crucial role in maintaining the delicate balance of our ecosystems, providing habitat for countless species and contributing to the overall health of our environment. As biodiversity continues to face unprecedented threats from climate change and habitat destruction, understanding the ecological importance of these remarkable trees has never been more vital. Their survival is not just a matter of preserving beauty; it directly impacts the resilience and sustainability of New Zealand’s natural landscapes.
In this article, we will explore the multifaceted role of NZ native trees in biodiversity conservation, shedding light on how they support wildlife, improve soil health, and influence local climates. You’ll discover practical tips on how you can contribute to their preservation and learn about innovative solutions being implemented to protect these invaluable resources. By the end of this journey, you’ll not only appreciate the ecological significance of NZ native trees but also feel empowered to take action in your community to help safeguard New Zealand’s unique biodiversity for future generations. So, let’s dive into the world of these incredible trees and uncover the vital connections they foster within our ecosystems!
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Overview of New Zealand’s Native Trees
Definition and Characteristics of NZ Native Trees
New Zealand is home to an impressive array of indigenous flora, with native trees playing a crucial role in its unique ecosystems. By definition, NZ native trees are those species that have evolved in the region over thousands of years, adapting to the specific climatic and geological conditions of the islands. Unlike introduced species, which can disrupt established ecosystems, these trees are integral to the health and balance of New Zealand’s natural environment.
One of the defining characteristics of NZ native trees is their remarkable adaptability. Many of these species have developed unique growth patterns that allow them to thrive in the diverse habitats found across the country, from coastal areas to mountainous regions. For example, the Kauri tree, known for its towering height and expansive trunk, can live for over a thousand years, adapting its growth to the changing environment. Other species, like the Pohutukawa, have evolved to withstand strong coastal winds and salt spray, showcasing the resilience of NZ native trees.
Additionally, NZ native trees often exhibit distinctive features that set them apart from non-native species. Many have specialized root systems that not only anchor them firmly in the ground but also enable them to absorb nutrients and water efficiently. The foliage of native trees, such as the Rimu and Totara, is adapted to maximize photosynthesis in New Zealand’s varying light conditions, ensuring their survival and growth. These characteristics underscore the ecological importance of NZ native trees, as they contribute to the overall health of the ecosystems they inhabit.
The Diversity of NZ Native Trees
The diversity of NZ native trees is truly astounding, with approximately 2,500 species identified across the islands. This rich variety includes iconic species such as Kauri, Totara, Rimu, and Pohutukawa, each with its unique traits and ecological roles. The Kauri tree, for instance, is not only a symbol of New Zealand’s natural heritage but also plays a vital role in its ecosystem by providing habitat for various species and contributing to soil health.
Geographically, NZ native trees are distributed across a range of environments, from the lush rainforests of the West Coast to the arid regions of Central Otago. The unique climatic conditions in these areas have led to the evolution of distinct tree species that are adapted to their specific environments. For example, the Southern Beech trees, known as Nothofagus, thrive in the cooler, wetter southern regions, while the Manuka tree is commonly found in drier, coastal areas.
In addition to their geographical distribution, the diversity of NZ native trees is reflected in their physical characteristics. Some species, like the towering Kauri, can reach heights of over 50 meters, while others, such as the small and hardy Mānuka, typically grow to only a few meters tall. This variation in size, shape, and growth habit contributes to the complexity of New Zealand’s ecosystems, providing habitats for numerous species of birds, insects, and other wildlife.
Historical Significance and Cultural Importance
The historical significance of NZ native trees extends far beyond their ecological roles; they are deeply woven into the cultural fabric of New Zealand, particularly within Māori culture. For centuries, Māori have recognized the importance of native trees in their daily lives, utilizing them for various purposes, including building materials, medicine, and food sources. The timber from the Totara tree, for example, has been traditionally used to construct canoes, houses, and carvings, showcasing the sustainable relationship between Māori and their natural environment.
In addition to practical uses, native trees hold spiritual significance for Māori communities. Many species are associated with specific legends and stories, serving as symbols of identity and connection to the land. The Kauri tree, revered for its majestic stature, is often seen as a representation of strength and resilience. The cultural practices surrounding the harvesting and use of native trees reflect a deep respect for nature and a commitment to sustainable stewardship.
Furthermore, the historical relationship between Māori and NZ native trees highlights the importance of preserving these species for future generations. As custodians of the land, Māori have long understood the interconnectedness of all living things, and their traditional ecological knowledge offers valuable insights into the conservation of native trees and the ecosystems they support. This perspective is increasingly recognized in contemporary conservation efforts, emphasizing the need for collaboration between indigenous communities and conservation organizations to protect New Zealand’s unique biodiversity.
In conclusion, NZ native trees are not only vital components of the country’s ecological landscape but also hold profound historical and cultural significance. Their unique characteristics, diversity, and deep-rooted connections to Māori culture underscore their importance in biodiversity conservation. As we delve deeper into the ecological roles of these native trees, it becomes evident that their preservation is essential for maintaining the health and resilience of New Zealand’s ecosystems. By understanding and appreciating the ecological importance of NZ native trees, we can take meaningful steps toward their conservation and the protection of New Zealand’s rich natural heritage.
Ecological Roles of NZ Native Trees
Habitat Provision
New Zealand’s native trees play an indispensable role in providing habitat for a diverse array of species, making them essential for maintaining the ecological balance within the region. With over 2,500 species of native trees, these flora not only contribute to the aesthetic beauty of the landscape but also serve as critical environments for numerous organisms. For example, the towering Kauri (Agathis australis) and the majestic Rimu (Dacrydium cupressinum) create layered canopies that offer shelter and nesting sites for various birds, insects, and other wildlife.
The Kiwi, a flightless bird native to New Zealand, is particularly reliant on these native trees for its survival. Its nocturnal habits and ground-nesting behavior make it vulnerable to habitat loss. The dense undergrowth provided by native trees serves as both camouflage and protection from predators. Similarly, the Takahe (Porphyrio hochstetteri), another endangered species, depends on the lush vegetation found in native forests for food and nesting sites. Without the presence of NZ native trees, these species would face significant challenges in finding suitable habitats, ultimately threatening their populations.
Moreover, the ecological roles of NZ native trees extend beyond just providing shelter. They support intricate food webs, where countless insects, birds, and mammals interact with the flora. For instance, native trees produce fruits, seeds, and nectar that are vital food sources for various species. The relationship between native trees and their associated wildlife exemplifies the interconnectedness of ecosystems, where the health of one component directly influences the well-being of others.
Carbon Sequestration
In the context of climate change, the carbon sequestration capabilities of NZ native trees cannot be overstated. These trees absorb carbon dioxide from the atmosphere, playing a crucial role in mitigating the effects of global warming. A mature Kauri tree, for instance, can store an impressive amount of carbon—up to 100 tons over its lifetime. This remarkable ability highlights the importance of preserving native forests not only for biodiversity but also for combating climate change.
The process of carbon sequestration involves photosynthesis, where trees take in carbon dioxide and convert it into organic matter, which then accumulates in their biomass. As NZ native trees grow, they sequester carbon, effectively acting as natural carbon sinks. The preservation and restoration of these native forests are essential strategies in the fight against climate change, as they provide a sustainable solution to reducing atmospheric carbon levels.
Furthermore, the role of NZ native trees in carbon storage extends to their influence on soil health. Healthy, well-established root systems contribute to soil stability and enhance its ability to store carbon. When native trees die and decompose, they return carbon to the soil, replenishing nutrients and supporting the growth of surrounding vegetation. This cycle of carbon storage and release underscores the vital role of native trees in maintaining ecosystem health and resilience.
Soil and Water Conservation
Native trees are also pivotal in promoting soil and water conservation, which are critical components of a healthy ecosystem. The root systems of NZ native trees help to bind the soil, preventing erosion and maintaining soil structure. This is particularly important in regions prone to landslides or heavy rainfall, where the absence of vegetation can lead to significant soil loss and degradation.
In addition to preventing soil erosion, NZ native trees play a key role in maintaining water quality. Their canopies intercept rainfall, allowing water to be gradually absorbed into the soil rather than running off directly into waterways. This process helps to filter pollutants and sediments, ensuring that the water that eventually reaches rivers and streams is clean and healthy for aquatic life. The presence of native trees along riverbanks is essential for creating buffer zones that protect waterways from agricultural runoff and other contaminants.
The relationship between native trees, soil health, and water quality is a testament to the interconnectedness of ecosystems. Healthy soils support robust tree growth, while thriving native trees contribute to the overall health of the environment. This synergy is vital for sustaining biodiversity, as it creates a conducive environment for various species to thrive.
Furthermore, the role of NZ native trees in the water cycle is significant. They contribute to transpiration, a process where water is absorbed by roots and released into the atmosphere through leaves. This not only helps regulate local climates but also promotes rainfall patterns, further supporting the growth of diverse flora and fauna. The intricate balance of these ecological processes highlights the importance of conserving NZ native trees as a means of ensuring the health and resilience of New Zealand’s ecosystems.
In summary, the ecological roles of NZ native trees are multifaceted and critical for biodiversity conservation. From providing habitat for endangered species to acting as natural carbon sinks and enhancing soil and water quality, these trees are integral to the health of New Zealand’s unique ecosystems. As we continue to explore the significance of these native trees, it becomes increasingly clear that their conservation is essential not only for the flora and fauna that depend on them but also for the overall health of our planet.
Native Trees and Biodiversity Conservation
Biodiversity Hotspots in New Zealand
New Zealand is renowned for its rich and diverse biodiversity, which is considered one of the most unique in the world. Among its ecological treasures, NZ native trees play a crucial role in sustaining and enhancing this biodiversity. Certain regions in New Zealand are recognized as biodiversity hotspots, areas where the preservation of native ecosystems is paramount. These hotspots, such as Fiordland and Tongariro, are characterized by their high levels of endemic species, meaning many plants and animals found here are not found anywhere else on Earth.
Fiordland, for example, is home to ancient rainforests dominated by towering native trees like the Kahikatea and Rimu. These trees not only provide habitat for countless species but also play a significant role in maintaining the ecological balance of the region. The unique climatic conditions and geographical features of these hotspots create an environment where NZ native trees thrive, supporting a plethora of flora and fauna, including many endangered species. The conservation of these areas is essential not just for the survival of the species that inhabit them but also for the overall health of New Zealand’s ecosystems.
Preserving biodiversity hotspots is a multifaceted challenge that requires a concerted effort from government agencies, conservation organizations, and local communities. The protection of these areas is vital for maintaining the genetic diversity of indigenous flora, which is essential for ecosystem resilience and adaptability in the face of environmental changes. By safeguarding these regions, we ensure that future generations can continue to enjoy the ecological benefits provided by NZ native trees and the myriad of life they support.
Role in Pollinator Habitats
NZ native trees are not only crucial for providing habitat for wildlife but also play a significant role in supporting pollinator populations. Pollinators, including bees, butterflies, and birds, are essential for the reproduction of many plants, including numerous native species. The relationship between native trees and pollinators is a delicate balance that is vital for the health of ecosystems.
Many native trees produce flowers that are rich in nectar, attracting various pollinators. For instance, the Pohutukawa tree, known as the New Zealand Christmas tree, bursts into vibrant red blooms during the summer months, providing a crucial food source for native birds such as the Tūī and the Bellbird. These birds, in turn, aid in the pollination of these trees, ensuring their continued growth and reproduction. The interdependence between NZ native trees and pollinators illustrates the intricate web of life that exists within New Zealand’s ecosystems.
Furthermore, the decline of pollinator populations poses a significant threat to the health of these ecosystems. Habitat loss, pesticide use, and climate change are all contributing factors to the decline of pollinators. Protecting NZ native trees and their habitats is essential for ensuring that pollinators have the resources they need to thrive. By conserving native forests and promoting the growth of indigenous flora, we can help sustain pollinator populations and, consequently, the entire ecosystem.
Native Trees as Food Sources
The ecological importance of NZ native trees extends to their role as vital food sources for a variety of wildlife. Many native trees produce fruits, seeds, and nectar that are essential for the survival of various species, including birds, insects, and mammals. For example, the native Karaka tree produces large, fleshy fruits that are a significant food source for birds like the Kererū (New Zealand pigeon). These birds play a crucial role in dispersing the seeds of the Karaka, allowing for the regeneration of this important tree species.
In addition to providing food for birds, NZ native trees also support a diverse range of insects. The nectar produced by flowering trees attracts not only pollinators but also other insects, including native butterflies and beetles. These insects, in turn, serve as food for larger animals, creating a complex food web that is essential for maintaining biodiversity. The loss of native trees would have cascading effects on these food chains, leading to declines in wildlife populations and a reduction in overall biodiversity.
Moreover, the fruits and seeds of native trees have been significant in Māori culture, providing sustenance and resources for generations. The traditional knowledge surrounding the use of these trees for food and medicine underscores the deep connection between indigenous people and the natural environment. This cultural significance adds another layer to the importance of conserving NZ native trees, as it helps preserve not only the ecological integrity of New Zealand but also the cultural heritage of its people.
In conclusion, NZ native trees are indispensable to biodiversity conservation in New Zealand. They create and sustain habitats, support pollinator populations, and provide essential food sources for wildlife. The health of these trees directly correlates with the health of the ecosystems they inhabit, highlighting the need for ongoing conservation efforts. By understanding and appreciating the ecological roles of native trees, we can take meaningful steps toward preserving New Zealand’s unique biodiversity for future generations.
Threats to NZ Native Trees
Invasive Species
New Zealand’s unique ecosystems, which are home to a diverse range of indigenous flora, are under constant threat from invasive species. These non-native organisms disrupt the delicate balance of native ecosystems and pose a significant risk to NZ native trees. Invasive species, such as possums, rats, and stoats, have been introduced to New Zealand over the last few centuries, often with devastating effects on native wildlife and vegetation.
Possums, for example, are known to feed on the leaves, flowers, and fruits of native trees, severely impacting their ability to reproduce and thrive. They are particularly fond of the foliage of species like Kauri and Rimu, which are crucial to the forest ecosystem. The New Zealand government estimates that possums consume approximately 21,000 tonnes of native vegetation annually, leading to a decline in the population of many native tree species.
Rats and stoats also contribute to the decline of NZ native trees by preying on native birds and their eggs, which play a vital role in seed dispersal. Without these birds, the regeneration of many native tree species is hindered. For instance, the seeds of the native tree species, such as Kahikatea and Totara, depend on birds like the Kereru (native wood pigeon) for effective dispersal. The decline of these bird populations due to predation by invasive species has a cascading effect on the entire ecosystem, further threatening the survival of NZ native trees.
According to the Department of Conservation, invasive species are one of the leading causes of biodiversity loss in New Zealand. The impact of these invasive organisms on native flora is not only ecological but also economic, as the government and local communities invest millions of dollars annually in pest control and eradication programs. Without sustained efforts to manage and mitigate the effects of invasive species, the future of NZ native trees and the biodiversity they support remains uncertain.
Deforestation and Land Use Changes
Deforestation and land use changes represent another significant threat to NZ native trees. The expansion of agriculture, urban development, and infrastructure projects has led to considerable habitat loss. Historically, New Zealand’s forests covered about 85% of the land; however, due to extensive logging and land clearing for farming, this figure has drastically reduced. Today, only about 30% of the land is covered by native forests, with many of these areas fragmented and isolated.
The conversion of native forests into agricultural land has particularly severe consequences for NZ native trees. Not only does it reduce the area available for these trees to grow, but it also disrupts the ecological processes that support their health and regeneration. The loss of habitat leads to a decline in native wildlife, which is essential for pollination and seed dispersal. Consequently, the survival of many native tree species is threatened, as they become unable to reproduce and sustain their populations.
Urban development further exacerbates the problem. As cities expand, native forests are often cleared to make way for housing, roads, and commercial buildings. This not only results in direct loss of trees but also increases pollution and alters local microclimates, making it more challenging for native trees to thrive. The fragmentation of forests into smaller patches limits the movement of wildlife, making it difficult for species to find mates and food, ultimately leading to a decline in biodiversity.
According to recent statistics, New Zealand has lost an estimated 30% of its original forest cover since European settlement, with ongoing deforestation rates posing a significant threat to the remaining native forests. The challenge lies in balancing development needs with the conservation of NZ native trees, which are integral to the health of the country’s ecosystems.
Climate Change Impacts
Climate change presents a multifaceted threat to NZ native trees and their ecosystems. As global temperatures rise and weather patterns shift, the impacts on indigenous flora are becoming increasingly evident. Changes in temperature and precipitation can directly affect the growth, reproduction, and survival of native tree species.
One of the most concerning effects of climate change is the alteration of rainfall patterns. Many NZ native trees have adapted to specific climatic conditions, and shifts in rainfall can lead to drought stress or flooding, both of which can be detrimental. For instance, species like the Kahikatea thrive in wet conditions, and a reduction in rainfall can hinder their growth and regeneration. Conversely, increased rainfall can lead to soil erosion, which can uproot young trees and destabilize the ecosystem.
Temperature increases also pose a significant threat. Many NZ native trees have specific temperature ranges in which they thrive. As temperatures rise, some species may struggle to survive in their current habitats, leading to a shift in species distribution. For example, the Kauri tree, which is iconic to New Zealand, is particularly sensitive to temperature changes and is already facing threats from the soil-borne pathogen Phytophthora Agathidicida. Warmer temperatures can exacerbate the spread of this pathogen, further endangering the Kauri population.
Moreover, climate change can also affect the timing of flowering and fruiting in native trees, disrupting the relationships between trees and their pollinators. Many native birds and insects rely on the availability of nectar and fruit from these trees, and any shift in timing can lead to mismatches that threaten their survival.
In summary, the impacts of climate change on NZ native trees are profound and far-reaching. The combination of invasive species, deforestation, and climate change creates a perfect storm that threatens the survival of these vital organisms. To protect NZ native trees and the biodiversity they support, it is essential to address these threats through sustainable land management practices, active restoration efforts, and climate change mitigation strategies.
Conservation Efforts for NZ Native Trees
Government Policies and Initiatives
In response to the threats facing NZ native trees, the New Zealand government has implemented various policies and initiatives aimed at conservation. Recognizing the ecological importance of these trees in biodiversity conservation, the government has established the New Zealand Biodiversity Strategy, which outlines a framework for protecting and restoring native habitats.
This strategy emphasizes the need for sustainable management of natural resources, including forests, to ensure the long-term survival of NZ native trees. It provides guidelines for land use planning, aiming to minimize habitat loss and degradation while promoting the restoration of native ecosystems. The government also allocates funding for conservation projects, supporting efforts to control invasive species, restore degraded habitats, and enhance the resilience of native forests.
Additionally, the Department of Conservation plays a crucial role in implementing these policies. They work closely with local communities, NGOs, and other stakeholders to develop and execute conservation programs. For example, the “Predator Free 2050” initiative aims to eradicate key invasive species by 2050, significantly reducing the pressure on native wildlife and flora. Such initiatives are vital for the preservation of NZ native trees and the ecosystems they support.
Community and NGO Involvement
Local communities and non-governmental organizations (NGOs) are also instrumental in the conservation of NZ native trees. Many grassroots efforts focus on restoring native forests and protecting threatened species. These initiatives often involve volunteer work, where community members come together to plant native trees, remove invasive species, and monitor local wildlife.
One notable example is the “Trees That Count” initiative, which encourages individuals and organizations to plant native trees across New Zealand. This program not only helps to restore habitats but also raises awareness about the importance of NZ native trees in biodiversity conservation. Participants can track their contributions and see the positive impact they are making on their local environment.
Moreover, NGOs like Forest & Bird actively advocate for the protection of native forests and promote sustainable land use practices. They engage in public awareness campaigns, lobbying for stronger environmental policies and educating the public about the ecological importance of NZ native trees. Their work often leads to successful conservation outcomes and fosters a sense of stewardship within communities.
Case studies of successful restoration projects illustrate the potential for community involvement in conserving NZ native trees. For instance, the restoration of the Hinewai Reserve on the Banks Peninsula is a prime example of how local efforts can lead to significant ecological recovery. By removing invasive species and replanting native trees, the area has seen a remarkable resurgence of biodiversity, demonstrating the power of community-led conservation.
Role of Education and Awareness
Education and awareness are critical components of successful conservation efforts for NZ native trees. By fostering a deeper understanding of the ecological importance of these trees, individuals and communities can become more engaged in conservation initiatives. Various educational programs and resources are available to raise awareness about the threats facing NZ native trees and the actions that can be taken to protect them.
Schools play a vital role in this educational effort, often incorporating environmental education into their curriculum. Programs that involve students in hands-on conservation activities, such as tree planting and habitat restoration, not only teach them about the significance of NZ native trees but also instill a sense of responsibility towards the environment. These experiences can inspire the next generation of conservationists and advocates for indigenous flora.
Additionally, public awareness campaigns led by government agencies and NGOs aim to inform the broader community about the ecological roles of native trees and the importance of biodiversity conservation. Social media, workshops, and community events are effective platforms for sharing knowledge and encouraging participation in conservation efforts. By highlighting success stories and the positive impact of community involvement, these campaigns can motivate individuals to take action in their own lives.
In conclusion, the conservation of NZ native trees is a multifaceted effort that requires collaboration between government bodies, local communities, NGOs, and individuals. By addressing the threats posed by invasive species, deforestation, and climate change through comprehensive policies and active community engagement, it is possible to protect and restore the vital ecosystems that these trees support. Education and awareness are essential in fostering a culture of conservation, ensuring that future generations appreciate and prioritize the preservation of New Zealand’s unique indigenous flora.
Frequently Asked Questions (FAQs)
What role do NZ native trees play in supporting local wildlife?
NZ native trees are crucial habitats for various species in New Zealand. They provide food, shelter, and breeding grounds for native birds, insects, and other wildlife. Many New Zealand species, such as the Kiwi and Kākā, rely on these trees for survival, making their conservation essential for maintaining biodiversity. By supporting a rich ecosystem, NZ native trees help sustain the delicate balance of life in their environments.
How do NZ native trees contribute to soil health?
NZ native trees enhance soil health through their root systems, which help prevent erosion and promote soil stability. Their fallen leaves and decomposed organic matter contribute nutrients back into the soil, fostering a fertile environment for other plant species. This nutrient cycling is vital for maintaining healthy ecosystems and supporting a diverse range of flora and fauna.
What is the significance of NZ native trees in carbon sequestration?
NZ native trees play a significant role in carbon sequestration, which is the process of capturing and storing atmospheric carbon dioxide. By absorbing CO2 during photosynthesis, these trees help mitigate climate change impacts. The preservation and restoration of NZ native forests are essential for enhancing their capacity to sequester carbon, contributing to global efforts in reducing greenhouse gas emissions.
How do NZ native trees influence water quality and hydrology?
NZ native trees protect water quality and enhance hydrology by stabilizing riverbanks and reducing runoff. Their extensive root systems filter pollutants and sediments, leading to cleaner waterways. Additionally, these trees help regulate water cycles by maintaining moisture levels in the soil and surrounding environment, which is vital for sustaining local ecosystems.
What are some threats to NZ native trees and their ecosystems?
NZ native trees face several threats, including habitat loss due to urban development, invasive species, and climate change. Invasive plants and animals often compete with native species for resources, leading to declines in biodiversity. Additionally, logging and land conversion for agriculture can severely impact these ecosystems. Conservation efforts are essential to protect NZ native trees and their habitats from these threats.
How can individuals contribute to the conservation of NZ native trees?
Individuals can contribute to the conservation of NZ native trees by participating in local reforestation projects, supporting conservation organizations, and advocating for sustainable land management practices. Planting native trees in gardens and community spaces can also promote biodiversity. Educating oneself and others about the importance of NZ native trees is crucial for fostering a culture of conservation within communities.
Are there any specific NZ native trees that are particularly important for biodiversity?
Several NZ native trees are particularly vital for biodiversity, including the Kauri, Rimu, and Totara. The Kauri tree, for example, is known for its vast trunk and longevity, creating unique habitats for various species. Rimu and Totara trees provide essential nesting sites and food sources for native birds. Protecting these iconic species is crucial for preserving New Zealand’s unique ecological heritage.
References
- Native Trees – Department of Conservation – Overview of New Zealand’s native trees and their role in ecosystems.
- The role of native trees in biodiversity conservation – ScienceDirect – Research article discussing the ecological functions of native trees in New Zealand.
- Native Trees – Te Ara Encyclopedia of New Zealand – Detailed information about various native trees and their ecological significance.
- Planting Native Trees – Department of Conservation – Guidelines and benefits of planting native trees for biodiversity conservation.
- The Ecological Importance of Native Trees – ResearchGate – Academic paper discussing the importance of native trees in New Zealand’s ecosystems.
- Planting Native Trees – My Garden – Practical tips and information on planting native trees in New Zealand gardens.
- Native Trees and Biodiversity – New Zealand Biodiversity – Insights into how native trees contribute to biodiversity in New Zealand’s landscapes.