气候变化领域集成服务门户(CCPortal): Positive outcomes between herbivore diversity and tree survival: Responses to management intensity in a Patagonian forest

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DOI	10.1016/j.foreco.2019.117738
	Positive outcomes between herbivore diversity and tree survival: Responses to management intensity in a Patagonian forest
	Nacif M.E.; Kitzberger T.; Garibaldi L.A.
发表日期	2020
ISSN	0378-1127
卷号	458
英文摘要	Sustainable forest management aims to both enhance biodiversity and tree productivity. However, trade-offs may exist between these objectives, e.g. arthropod diversity and associated arthropod herbivory can reduce tree growth and survival. Tree productivity and biodiversity may also show non-linear responses to management intensity, making applied recommendations even more challenging. We studied the effects of harvesting intensity for firewood extraction in a northern Patagonian forest (Argentina) on leaf damage diversity (as a proxy of arthropod folivore diversity), leaf damage frequency, growth and survival of planted trees of Nothofagus obliqua for timber purpose. We randomly applied four levels of harvesting intensity (0, 30, 50, and 70% of basal area removal) in experimental plots and we followed the responses on the focal planted tree species during two growing seasons. After harvesting, air temperature and photosynthetic active radiation increased, while relative humidity decreased, with harvesting intensity. Leaf damage diversity and frequency showed non-linear responses to harvesting intensity, both achieving its highest values at intermediate harvesting intensities (30% and 50% of basal area removal). Such responses were consistent for contrasting feeding guilds, using different diversity indices, and during the two study growing seasons. Interestingly, leaf damage diversity and frequency were positively and strongly correlated across the plots. Despite great leaf damage frequency (around 45% of the leaves were damaged), plant survival was also highest at intermediate harvesting intensities during the two years. Planted trees also grew more at intermediate harvesting intensities during the second year, but increased linearly with harvesting intensity during the first year. Hence, at intermediate harvesting intensity, no trade-off was observed between arthropod biodiversity and planted tree sapling survival and growth. In northern Patagonia, trees may face less competition for light and soil resources at intermediate harvesting intensities, while at high harvesting intensities water stress typical of dry Patagonian summers could reduce tree survival. Such benefits were not offset by the greater leaf damage (associated with enhanced damage diversity) observed at intermediate harvesting intensities. Therefore, intermediate levels of management intensity can provide the double service of increasing arthropod diversity and maximizing tree survival and growth, especially during the most critical establishment period. © 2019 Elsevier B.V.
关键词	Biodiversity Economic and social effects Harvesting Plants (botany)Productivity Arthropod guilds Commercial plantation Intermediate harvesting Non-linear response Nothofagus Photosynthetic active radiations Survival and growth Sustainable forest management Forestry air temperature arthropod basal area cutting (process)deciduous tree forest management guild structure harvesting herbivore species diversity survival Biodiversity Forestry Harvesting Nothofagus Productivity Sustainable Forest Management Argentina Patagonia Arthropoda Nothofagus obliqua
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133056
推荐引用方式 GB/T 7714	Nacif M.E.,Kitzberger T.,Garibaldi L.A.. Positive outcomes between herbivore diversity and tree survival: Responses to management intensity in a Patagonian forest[J]. Forest Ecology and Management,2020,458.
APA	Nacif M.E.,Kitzberger T.,&Garibaldi L.A..(2020).Positive outcomes between herbivore diversity and tree survival: Responses to management intensity in a Patagonian forest.,458.
MLA	Nacif M.E.,et al."Positive outcomes between herbivore diversity and tree survival: Responses to management intensity in a Patagonian forest".458(2020).