نتایج جستجو برای: terrestrial ecosystems
تعداد نتایج: 76121 فیلتر نتایج به سال:
Lagoons are habitat islands in the coastal landscapes characterised by both among ecosystems 1 heterogeneity, due to different terrestrial-freshwater, freshwater-marine interfaces, and within ecosystem heterogeneity, due patchy spatial and temporal distribution of biotic and abiotic
Global warming potentially alters the terrestrial carbon (C) cycle, likely feeding back to further climate warming. However, how the ecosystem C cycle responds and feeds back to warming remains unclear. Here we used a meta-analysis approach to quantify the response ratios of 18 variables of the ecosystem C cycle to experimental warming and evaluated ecosystem C-cycle feedback to climate warming...
Methyl mercury (MeHg) is one of the most hazardous contaminants in the environment, adversely affecting the health of wildlife and humans. Recent studies have demonstrated that aquatic insects biotransport MeHg and other contaminants to terrestrial consumers, but the factors that regulate the flux of MeHg out of aquatic ecosystems via emergent insects have not been studied. The authors used exp...
Recent improvements in our understanding of the dynamics of soil carbon have shown that 20-40% of the approximately 1,500 Pg of C stored as organic matter in the upper meter of soils has turnover times of centuries or less. This fast-cycling organic matter is largely comprised of undecomposed plant material and hydrolyzable components associated with mineral surfaces. Turnover times of fast-cyc...
We have applied association analysis to 17 years of ocean climate observations and predicted net ecosystem production on land to infer short-term (monthly to yearly) teleconnections between sea surface temperature and terrestrial carbon cycles. The analysis suggests that, on a global level, ocean climate indices can be used to reliably predict net ecosystem carbon fluxes over more than 58 perce...
INTRODUCTION History and Background Objectives Data Sources Need for the Study Method of Analysis GENERAL INFORMATION • The Oil Shale Resource Retorting Technologies State of the Industry TABLE OF CONTENTS Assumptions about Oil Shale Technology Application . CARCINOGENIC POTENTIAL OF OIL SHALE AND SHALE PRODUCTS Background Description of Oil Shale Shale Oil Spent Shale • Indicator Compound POTE...
Life-history traits of commercially important species, physiological attributes of the framework species, and characteristics of ecosystem processes make coral reefs especially vulnerable to export of biomass. Organisms in ecosystems driven by upwelling and terrestrial nutrient input are more amenable to biomass yield. Nonexportive approaches to resource management, exemplified by Palau, are co...
The use of terrestrial and aquatic invertebrates as a management tool for monitoring change in ecosystems is reviewed and critically evaluated. Their suitability and value for assessing a range of environmental problems from pollution impacts, through habitat evaluation for conservation to the long-term degradation and recovery of ecosystems, is critically discussed. Guidelines are provided for...
The terrestrial ecosystems of Victoria Land, Antarctica are characteristically simple in terms of biological diversity and ecological functioning. Nematodes are the most commonly encountered and abundant metazoans of Victoria Land soils, yet little is known of their diversity and distribution. Herein we present a summary of the geographic distribution, habitats and ecology of the terrestrial ne...
Climate change can have devastating effects on a wide variety of terrestrial ecosystems. The Dynamic Land Ecosystem Model (DLEM) enables scientists to computationally analyze, understand, and quantify the dynamics and evolution of ecosystems at large spatio-temporal scales. In order to overcome fundamental limitations on the execution performance of DLEM, we have designed pDLEM, a parallel vers...
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