نتایج جستجو برای: astara forest ecosystem

تعداد نتایج: 179070  

Journal: :Ecological applications : a publication of the Ecological Society of America 2013
Taylor H Ricketts Eric Lonsdorf

Natural ecosystems benefit human communities by providing ecosystem services such as water purification and crop pollination. Mapping ecosystem service values has become popular, but most are static snapshots of average value. Estimating instead the economic impacts of specific ecosystem changes can better inform typical resource decisions. Here we develop an approach to mapping marginal values...

2014
Heidi J. Renninger Kenneth L. Clark Karina V.R. Schäfer Nicholas Carlo Karina V. R. Schäfer

Although snags and coarse woody debris are a small component of ecosystem respiration, disturbances can significantly increase the mass and respiration from these carbon (C) pools. The objectives of this study were to (1) measure respiration rates of snags and coarse woody debris throughout the year in a forest previously defoliated by gypsy moths, (2) develop models for dead stem respiration r...

2013
Kiersten B Johnson Anila Jacob Molly E Brown

Healthy forests provide human communities with a host of important ecosystem services, including the provision of food, clean water, fuel, and natural medicines. Yet globally, about 13 million hectares of forests are lost every year, with the biggest losses in Africa and South America. As biodiversity loss and ecosystem degradation due to deforestation continue at unprecedented rates, with conc...

2015
Jacob L. Slusser

Background: The tropical dry forest, the most endangered ecosystem in the Neotropics, is threatened by the dominance of extensive conventional cattle ranching. The consequences of this land use system are particularly evident in the dry forest ecosystem of Panama’s Azuero Peninsula. Deforestation and soil degradation have impaired ecosystem services, which are necessary to support ranching and ...

Journal: :Ecological applications : a publication of the Ecological Society of America 2012
Fran Sheldon Erin E Peterson Ed L Boone Suzanne Sippel Stuart E Bunn Bronwyn D Harch

Catchment and riparian degradation has resulted in declining ecosystem health of streams worldwide. With restoration a priority in many regions, there is an increasing interest in the scale at which land use influences stream ecosystem health. Our goal was to use a substantial data set collected as part of a monitoring program (the Southeast Queensland, Australia, Ecological Health Monitoring P...

Journal: :Ecological applications : a publication of the Ecological Society of America 2007
Zhongwei Guo Yiming Li Xiangming Xiao Lin Zhang Yaling Gan

Globally, particularly in developing countries, hydroelectricity production and economic growth occur together with ecosystem/biodiversity conservation in watersheds. There is a relationship between hydroelectricity production and ecosystem/biodiversity conservation in watersheds, centering on the supply and demand for ecosystem services of river water flow regulation and sediment retention. He...

2002
W. Su

The simulation model was built using an agentbased modelling approach. The approach builds a virtual landscape ecosystem and simulates how the various components of the forest ecosystem fit together and interact with each other. Fire is the main disturbance source in the succession of the eucalypt forest ecosystem in this area and plays a critical role in the process of patterning the forested ...

2017
Minli Wan Dalia D’Amato Anne Toppinen Mika Rekola

Global awareness of sustainability issues is growing rapidly, and business organizations are called to address wider social and environmental concerns along with economic performance. However, limited systematic knowledge exists on the interactions between forest industries and natural ecosystems. We thus investigated the role of ecosystem services in the context of China’s forest sector. A qua...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Chase D Mendenhall Cagan H Sekercioglu Federico Oviedo Brenes Paul R Ehrlich Gretchen C Daily

Growing demand for food, fuel, and fiber is driving the intensification and expansion of agricultural land through a corresponding displacement of native woodland, savanna, and shrubland. In the wake of this displacement, it is clear that farmland can support biodiversity through preservation of important ecosystem elements at a fine scale. However, how much biodiversity can be sustained and wi...

2013
Nilesh Timilsina Wendell P. Cropper Francisco J. Escobedo Joanna M. Tucker Lima

Managing forests for multiple ecosystem services such as timber, carbon, and biodiversity requires information on ecosystem structure and management characteristics. National forest inventory data are increasingly being used to quantify ecosystem services, but they mostly provide timber management and overstory data, while data on understory shrub and herbaceous diversity are limited. We obtain...

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