نتایج جستجو برای: forest species changing

تعداد نتایج: 771031  

Journal: :international journal of environmental research 2015
v. v. brygadyrenko

specific features of the structure of the ground litter invertebrate community in forest belt ecosystems in the ukrainian steppe zone have been considered. for 14 years invertebrate fauna of the litter of 176 forest belt sites with different composition has been studied with the aid of soil traps. the main characteristics of litter invertebrate communities (total population, a number of species...

2016
Barbara Fussi Marjana Westergren Filippos Aravanopoulos Roland Baier Darius Kavaliauskas Domen Finzgar Paraskevi Alizoti Gregor Bozic Evangelia Avramidou Monika Konnert Hojka Kraigher

Safeguarding sustainability of forest ecosystems with their habitat variability and all their functions is of highest priority. Therefore, the long-term adaptability of forest ecosystems to a changing environment must be secured, e.g., through sustainable forest management. High adaptability is based on biological variation starting at the genetic level. Thus, the ultimate goal of the Conventio...

2011
Donatella Paffetti Olbrich Maren Matthias Fladung Dieter Ernst Thorsten Markussen Manfred Forstreuter Francesca Donnarumma Veronika Kučerová Maik Veste Cristina Vettori

Background The scenario of a changing environment, widely termed as global change is mainly caused by human activities. Oil and carbon combustion, the use of chlorofluorocarbons, and deforestation are one of the main factors responsible for increasing CO2 concentration and for an increase of air temperature. In addition global changes will affect precipitation patterns, nitrogen concentration i...

2016
Anne C. S. McIntosh S. Ellen Macdonald Sylvie A. Quideau

Understory plant communities play critical ecological roles in forest ecosystems. Both above- and below-ground ecosystem properties and processes influence these communities but relatively little is known about such effects at fine (i.e., one to several meters within-stand) scales, particularly for forests in which the canopy is dominated by a single species. An improved understanding of these ...

2016
Romain Bertrand Gabriela Riofrío-Dillon Jonathan Lenoir Jacques Drapier Patrice de Ruffray Jean-Claude Gégout Michel Loreau

Biodiversity changes are lagging behind current climate warming. The underlying determinants of this climatic debt are unknown and yet critical to understand the impacts of climate change on the present biota and improve forecasts of biodiversity changes. Here we assess determinants of climatic debt accumulated in French forest herbaceous plant communities between 1987 and 2008 (that is, a 1.05...

Journal: :Ecological applications : a publication of the Ecological Society of America 2008
Anne K Eschtruth John J Battles

Hemlock woolly adelgid (HWA; Adelges tsugae) infestations have resulted in the continuing decline of eastern hemlock (Tsuga canadensis) throughout much of the eastern United States. While the initial impacts of HWA infestations have been documented, our understanding of forest response to this disturbance remains incomplete. HWA infestation is not occurring in isolation but within a complex eco...

2014
LAUREN E. OAKES PAUL E. HENNON KEVIN L. O’HARA RODOLFO DIRZO

Pervasive forest mortality is expected to increase in future decades as a result of increasing temperatures. Climate-induced forest dieback can have consequences on ecosystem services, potentially mediated by changes in forest structure and understory community composition that emerge in response to tree death. Although many dieback events around the world have been documented in recent years, ...

Journal: :Intelligent Automation & Soft Computing 2012
Baoguo Wu Yan Qi Song Zhu Fei Gao Enying Guo

In order to meet the demand of modern forest resources management and data update, this paper analyses the reasons of the forest resource data changes in the forest resource information management, introduces the concept of changing event to describe the reasons of the changes, codes the events changing the sub-compartment data coding, and designs the spatio-temporal database structure of fores...

Hyrcanian forests are one of the most valuable forests in the world, dating from about 25 to 50 million years old. Climate variation, unique plant and animal species accompany with habitat diversity have made these forests one of the most unique ecosystems on Earth and worthy of being listed on the UNESCOchr('39')s World Heritage List. Therefore, the main purpose of this study is to use both De...

Journal: :caspian journal of environmental sciences 2011
h. pourbabaei r. abedi

the objective of this research was to identify and describe the different ecological species groups (vegetation types) present in the rural heritage museum of guilan. the study area was approximately 260 ha, which is located in the saravan forest park in guilan province, north of iran. sampling procedure was performed with a systematic random technique. a total of 89 plots were sampled. classif...

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