نتایج جستجو برای: ecosystem components
تعداد نتایج: 468558 فیلتر نتایج به سال:
Marine ecosystem is a complex nonlinear system. However, ecosystem health assessment conventionally builds on a linear superposition of changes in ecosystem components and probably fails to evaluate nonlinear interactions among various components. To better reflect the intrinsic interactions and their impacts on ecosystem health, an ecosystem coordination index, defined as the matching level of...
Effective ecosystem-based management requires understanding ecosystem responses to multiple human threats, rather than focusing on single threats. To understand ecosystem responses to anthropogenic threats holistically, it is necessary to know how threats affect different components within ecosystems and ultimately alter ecosystem functioning. We used a case study of a Mediterranean seagrass (P...
Just as real-world food webs contain complex interactions among species, so too must scientists and others interact to describe food webs in realistic ways. The most useful ecosystem models are constructed through collaboration among a wide range of experts. Collaboration among Prince William Sound (PWS), Alaska, researchers resulted in a mass-balanced Ecopath model of trophic flows including a...
Climate change may represent the greatest future risk to the sagebrush ecosystem. Improved ways to quantify and monitor gradual change resulting from climate influences in this ecosystem are vital to its future management. For this research, the change over time of five continuous field cover components including bare ground, herbaceous, litter, sagebrush, and shrub were measured on the ground ...
A deterministic mathematical model for ecosystem development on slag dumps has been formulated and based on five components of the ecosystem—soil total nitrogen, plant biomass, plant cover, soil moisture, litter, and soil fine particles. Nitrogen and soil moisture, which regulate vegetation development on the slag dumps, have been used as the driving parameters of the model. The numerical resul...
The paradigm of dynamical systems as frame of description has been extremely successful for a variety of controlled systems. The ingredients of such an approach are an (assumed or known) fixed number of degrees of freedom, a phase space, state variables, and a (usually differential) equation of motion governing the temporal evolution of the system, or its movement in phase space along certain t...
Defining the basis for development of a country’s start-up ecosystems as activating entrepreneurship is an urgent task restoring economy. The purpose this study to identify ways improve ecosystem based on construction economic and mathematical models business activities. research methodology statistical methods, namely dynamics analysis; assess strength influence each component change in positi...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید