نتایج جستجو برای: ecosystem cycles
تعداد نتایج: 171643 فیلتر نتایج به سال:
Abstract Cyclic fluctuations of prey have profound effects on the functioning ecosystems, for example, by changing dynamics, behavior, and intraguild interactions predators. The aim this study was to assess effect rodent cyclic in interspecific a guild small- medium-sized predators: red fox ( Vulpes vulpes ), pine marten Martes martes weasels Mustela erminea nivalis ) boreal ecosystem. We analy...
Population cycling is a widespread phenomenon, observed across a multitude of taxa in both laboratory and natural conditions. Historically, the theory associated with population cycles was tightly linked to pairwise consumer-resource interactions and studied via deterministic models, but current empirical and theoretical research reveals a much richer basis for ecological cycles. Stochasticity ...
It is proposed that long wave economic cycles are related to natural variability, and thus we might only be able to properly manage the ecosystem by combining our understanding of the sources and mechanisms of that natural variability to our limited social and economic planning capabilities.
The structure and function of marine ecosystems are not fixed. Instead, major innovations - from the origin of oxygenic photosynthesis, to the evolution of reefs or of deep bioturbation, to the rise of pelagic calcifiers - have changed biogeochemical cycles and ecosystem dynamics. As a result, modern marine ecosystems are fundamentally different from those in the distant past.
Stable isotopes of carbon and nitrogen are increasingly used in marine ecosystems, for ecological and environmental studies. Here, we examine some applications of stable isotopes as ecological integrators or tracers in seagrass ecosystem studies. We focus on both the use of natural isotope abundance as food web integrators or environmental tracers and on the use of stable isotopes as experiment...
Soil microorganisms are key players in biogeochemical cycles. Yet, there is no consistent view on the significance of microbial biodiversity for soil ecosystem functioning. According to the insurance hypothesis, declines in ecosystem functioning due to reduced biodiversity are more likely to occur under fluctuating, extreme or rapidly changing environmental conditions. Here, we compare the func...
We explore whether Rotterdam city has the governance capacity in terms of processes at place, and the attention in terms of vision and strategy to take up an integrated approach toward urban resilience. We adopt an interpretative policy analysis approach to assess the dynamics of urban ecosystem governance considering interviews, gray literature, and facilitated dialogues with policy practition...
[1] Current coupled ocean-atmosphere model (COAM) projections of future oceanic anthropogenic carbon uptake suggest reduced rates due to surface warming, enhanced stratification, and slowed thermohaline overturning. Such models rely on simple, bulk biogeochemical parameterisations, whereas recent ocean observations indicate that floristic shifts may be induced by climate variability, are widesp...
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