نتایج جستجو برای: forest ecosystems
تعداد نتایج: 144986 فیلتر نتایج به سال:
MUCh attention is now given to risks and impacts of exotic pest introductions in forest ecosystems. This concern is for good reason because, once introduced, an exotic pathogen or insect encounters little resistance in the native plant population and can produce catastrophic losses in relatively short periods of time. Most native fungal pathogens of forest trees have co-evolved for eons with th...
Introduction It is the purpose of the Convention on Biological Diversity to protect biological diversity in all of its richness – this is also done in awareness of its importance for the functioning of vital systems such as ecosystems, climate systems and water systems. Forests include some of the world’s most important biodiversity reserves with some forest soils alone containing thousands of ...
A major force affecting many forest ecosystems is the encroachment of residential, commercial and industrial development. Analysis of the complex interactions between development decisions and ecosystems, and how the environmental consequences of these decisions influence human values and subsequent decisions will lead to a better understanding of the environmental consequences of private choic...
Resource pulses are occasional events of ephemeral resource superabundance that occur in many ecosystems. Aboveground consumers in diverse communities often respond strongly to resource pulses, but few studies have investigated the belowground consequences of resource pulses in natural ecosystems. This study shows that resource pulses of 17-year periodical cicadas (Magicicada spp.) directly inc...
Carbon Nitrogen Interactions in Forest Ecosystems Final Report Other How to cite: Gunderson, P.; Berg, B.; Currie, W. S.; Dise, N. B.; Emmett, B. A.; Gauci, V.; Holmberg, M.; Kjonaas, O. J.; Mol-Dijkstra, J.; van der Salm, C.; Schmidt, I. K.; Tietema, A.; Wessel, W. W.; Vestgarden, L. S.; Akselsson, C.; De Vries, W.; Forsius, M.; Kros, H.; Matzner, E.; Moldan, F.; Nadelhoffer, K. J.; Nilsson, L...
Conversion of native rainforest ecosystems in Limón Province of Costa Rica to banana and pineapple monoculture has led to reductions in biodiversity and soil quality. Agroforestry management of cacao (Theobroma cacao) is an alternative system that may maintain the agricultural livelihood of the region while more closely mimicking native ecosystems. This study compared physical, biological and c...
Project Goals and Objectives – The objective of the proposed surveys and analyses are to (1) produce a quantitative baseline characterization of the structure of kelp forest ecosystems in five of the marine protected areas (MPAs) recently established by the MLPA Initiative in the NCCSR, (2) provide a quantitative comparison between the kelp forest ecosystems in these MPAs and associated referen...
Forest degradation in protected areas has been monitored around the world with remote sensing data, but degradation processes undetectable by widely used satellite sensors have been largely overlooked. Increased human pressures and socioeconomic development make forest protection more challenging, particularly for forest ecosystems that lie across national borders because of the differences in ...
Forest ecosystems play a critical role in the cycles of carbon and water from local to global scales. These cycles and their variability, in turn, play an important role in the non-trivial emergent and self-organizing interactions between forest ecosystems and their environment. Observational evidence, based on micrometeorological eddy covariance measurements, suggests that heterogeneity and di...
Systematic and elaborate multidisciplinary research of pedunculate oak and common hornbeam began in the Forest Research Institute in Jastrebarsko in 1991. That led to a development of a method for monitoring deposition in forest ecosystems which is now closely related to the International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forest. Several forest comm...
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