نتایج جستجو برای: anthropogenic impact
تعداد نتایج: 781260 فیلتر نتایج به سال:
Anthropogenic habitat disturbance impairs ecosystem health by fragmenting forested areas, introducing environmental contamination, and reducing the quality of habitat resources. The effect of this disturbance on wildlife health is of particular concern in Madagascar, one of the world's biodiversity hotspots, where anthropogenic pressures on the environment remain high. Despite the conservation ...
The direct and semi-direct radiative effects of anthropogenic aerosols on the radiative transfer and cloud fields in the Western United States (WUS) according to seasonal aerosol optical depth (AOD) and regional climate are examined using a regional climate model (RCM) in conjunction with the aerosol fields from a GEOS-Chem chemicaltransport model (CTM) simulation. The two radiative effects can...
Abstract Using time series data for the period 1959–2015, our empirical analysis examines simultaneous effects of individual components global carbon budget on temperature. Specifically, we explore possible emissions caused by fossil fuel combustion, cement production, land-use change emissions, and sinks (here in terms land sink ocean sink) climate change. The inclusion allows us to look at co...
Humans have transformed Europe’s landscapes since the establishment of the first agricultural societies in the mid-Holocene. The most important anthropogenic alteration of the natural environment was the clearing of forests to establish cropland and pasture, and the exploitation of forests for fuel wood and construction materials. While the archaeological and paleoecological record documents th...
Diazotrophs in the mangrove rhizosphere play a major role in providing new nitrogen to the mangrove ecosystem and their composition and activity are strongly influenced by anthropogenic activity and ecological conditions. In this study, the diversity of the diazotroph communities in the rhizosphere sediment of five tropical mangrove sites with different levels of pollution along the north and s...
Cetacean responses to marine anthropogenic activities include changes in acoustic behavior, surface behavior, dive behavior, direction of travel, and behavioral activity states. However, the consequences of these behavioral responses are often difficult to quantify in biological currencies. Previous studies, including our ONR-supported work on the metabolic costs of communicative sound and clic...
Studies on the effects of anthropogenic activity on wildlife aim to provide a sound scientific basis for management. However, misinterpretation of the theoretical basis for these studies can jeopardise this objective and lead to management outcomes that are detrimental to the wildlife they are intended to protect. Misapplication of the terms ‘habituation’, ‘sensitisation’ and ‘tolerance’ in imp...
Multiple stress mechanisms have caused a worldwide decrease in seagrasses, which are vulnerable to environmental and/or anthropogenic pressure. The loss of seagrass meadows of Halodule wrightii is reported for the littoral of Itamaracá Island (Northeastern Brazil). The present study identified the main anthropogenic factors that negatively influenced over the abundance and distribution of seagr...
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