نتایج جستجو برای: forest ecosystems

تعداد نتایج: 144986  

Journal: :Neotropical entomology 2007
Gilberto M de M Santos Carlos C Bichara Filho Janete J Resende Jucelho D da Cruz Oton M Marques

We studied the structure and composition of communities of social wasps associated with the three insular ecosystems: mangrove swamp, the Atlantic Rain Forest and the 'restinga'- lowland sandy ecosystems located between the mountain range and the sea. Three hundred and ninety-one nests of 21 social wasp species were collected. The diversity of wasps found in each ecosystem was significantly cor...

Journal: :Entropy 2017
Olga Kuricheva Vadim Mamkin Robert Sandlersky Yuriy Puzachenko Andrej Varlagin Juliya Kurbatova

Entropy production (σ) is a measure of ecosystem and landscape stability in a changing environment. We calculated the σ in the radiation balance for a well-drained spruce forest, a paludified spruce forest, and a bog in the southern taiga of the European part of Russia using long-term meteorological data. Though radiative σ depends both on surface temperature and absorbed radiation, the radiati...

2013
Xiuping Liu Wanjun Zhang Jiansheng Cao Huitao Shen Xinhua Zeng Zhiqiang Yu Xin Zhao

Afforestation is a mitigation option to reduce the increased atmospheric carbon dioxide levels as well as the predicted high possibility of climate change. In this paper, vegetation survey data, statistical database, National Forest Resource Inventory database, and allometric equations were used to estimate carbon density (carbon mass per hectare) and carbon storage, and identify the size and s...

2005
N. H. Ravindranath N. V. Joshi R. Sukumar A. Saxena

Global assessments have shown that future climate change is likely to significantly impact forest ecosystems. The present study makes an assessment of the impact of projected climate change on forest ecosystems in India. This assessment is based on climate projections of Regional Climate Model of the Hadley Centre (HadRM3) using the A2 (740 ppm CO2) and B2 (575 ppm CO2) scenarios of Special Rep...

Journal: :Netherlands Journal of Agricultural Science 1993

2017
Achim Bräuning Andreas Bolte Cristina Nabais Sergio Rossi Ute Sass-Klaassen

Department of Geography and Geosciences, Institute of Geography, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany, 2 Thünen Institute of Forest Ecosystems, Eberswalde, Germany, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Centro de Ecologia Funcional, Universidade de Coimbra, Coimbra, Portugal, Département des Sciences Fondamentales, Université du Qu...

2008
William D. Gosling Francis E. Mayle Nicholas J. Tate Timothy J. Killeen

Differentiation between Neotropical rainforest, dry forest, and savannah ecosystems by their modern pollen spectra and implications for the fossil pollen record Journal Article How to cite: Gosling, William D.; Mayle, Francis E.; Tate, Nicholas J. and Killeen, Timothy J. (2009). Differentiation between Neotropical rainforest, dry forest, and savannah ecosystems by their modern pollen spectra an...

2006
Stanley A Temple David J Flaspohler

he meeting of forest and field is an ecotone--the juxtaposition of two structurally and compositionally different ecosystems. Ecotones exist at several spatial scales, ranging from local-scale edges between patches of different habitat o continental-scale transitions between major biomes. The transitions between adjacent ecosystems may be gradual or abrupt. So-called inherent edges occur as a r...

2007
Samuel A. Cushman Donald McKenzie David L. Peterson Jeremy Littell Kevin S. McKelvey

Reliable predictions of how changing climate and disturbance regimes will affect forest ecosystems are crucial for effective forest management. Current fire and climate research in forest ecosystem and community ecology offers data and methods that can inform such predictions. However, research in these fields occurs at different scales, with disparate goals, methods, and context. Often results...

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