Using a Paleoecology Approach to Study Human-set Fires in New Zealand
Why study human-fire interactions in New Zealand?
New Zealand provides a unique setting for examining human impacts because the country was settled fairly recently (c. 700 yrs ago) during a time of relatively stable climate. In addition, the temperate forests of New Zealand were sensitive to land-use activities that accompanied human arrival. The first peoples in New Zealand initiated a sequence of events that resulted in the loss of more than 40 percent of the forests, and this deforestation occurred within decades of human arrival. It was accomplished by the introduction of a new disturbance—fire. Additionally, these widespread forest transitions were initiated by relatively small, mobile populations in the absence of climate change, a situation that is contrary to other temperate forest regions where deforestation was associated with dense agricultural populations and/or significant climate change. New Zealand offers one of the most dramatic examples of human-caused deforestation through the deliberate use of fire, and its vegetation and fire history provides an important case study for understanding the consequences of temperate forest transitions occurring worldwide today.
The following are key research questions related to the study of human-fire-climate interactions in New Zealand:
- How did fire activity change after humans arrived?
- Were the environmental consequences of human-set fires a result of the frequency and type of fires or by environmental conditions (e.g. rainfall, temperature ?
- Why did native beech forests fail to recover following decreases in fire activity?
- How can New Zealand example help us better understand temperate forest vulnerability to future climate warming and land-use change?
- How did early humans shape fire and what were the ecological consequences?
- Why are some ecosystems more sensitive to human activities, particularly human-set fires, than others?
- How can we use what we learn from investigating past and present human influences to support ecosystem resilience to changing climate conditions?
On a global basis, real-world applications of answering these and other related research questions include:
- Help managers anticipate vulnerabilities and impacts of future land-use and climate change.
- Prioritize conservation efforts globally, particularly in identifying regions that are largely pristine and worthy of protection.
- Lay the groundwork for developing restoration and management objectives that help support ecosystem resilience to changing conditions.
Scientists working on this project outline a conceptual model for understanding human impacts on fire regimes and vegetation in different settings
Results documenting early human and European impacts in New Zealand are found in two papers
- Rapid landscape transformation in New Zealand
- Changes in Fire Activity following human arrival in New Zealand
Te Ara - The Encyclopedia of New Zealand tells the story of human effects on the environment in New Zealand, beginning with the earliest humans.
View a video from the Wildfire PIRE project titled, "The Core of the Problem: Fire Histories from New Zealand's Lakes." This video describes the fire history of New Zealand's unique landscape. Fire scientists from around the globe reconstruct New Zealand's fire, vegetation and climate history using lake-sediment cores and tree-ring records. These records reveal the story of New Zealand before and after the arrival of Maori and European settlers.
WildFire PIRE Project is an international partnership focused on the causes and consequences of fire in the past, present, and future: a partnership that brings together an array of fire scientists and managers to learn from each other and provide knowledge about fire's role in the Earth System. Our vision is be a leader in interdisciplinary discovery, education, and engagement focused on wildfire in temperate ecosystems, starting in New Zealand, Australia and the western U.S., but with the goal of extending fire science more broadly.