نتایج جستجو برای: anthropogenic factor

تعداد نتایج: 867506  

2017
Erica J Newton Brent R Patterson Morgan L Anderson Arthur R Rodgers Lucas M Vander Vennen John M Fryxell

Woodland caribou (Rangifer tarandus caribou) in Ontario are a threatened species that have experienced a substantial retraction of their historic range. Part of their decline has been attributed to increasing densities of anthropogenic linear features such as trails, roads, railways, and hydro lines. These features have been shown to increase the search efficiency and kill rate of wolves. Howev...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2016
Robert I McDonald Katherine F Weber Julie Padowski Tim Boucher Daniel Shemie

Urban water systems are impacted by land use within their source watersheds, as it affects raw water quality and thus the costs of water treatment. However, global estimates of the effect of land cover change on urban water-treatment costs have been hampered by a lack of global information on urban source watersheds. Here, we use a unique map of the urban source watersheds for 309 large cities ...

Journal: :Türkiye jeoloji bülteni 2023

This study discusses the results of ecological risk analysis sediments taken from Kilitbahir Port, one most active ports on shores Strait Çanakkale. ICP-MS analyzes collected samples revealed moderate enrichment in Mo, Cu and Zn relation to anthropogenic activities studied sediments. The compatibility geoaccumulation factor data explains that pollution is anthropogenic. No significant toxic was...

Journal: :محیط شناسی 0
عبدالرضا کرباسی دانشکده محیط زیست دانشگاه تهران شهرزاد ولوی کارشناس ارشد محیط زیست دانشکدة محیط زیست واحد علوم و تحقیقات اهواز

present survey studies intensity of heavy metals pollution (ca, fe, ni, cd, pb, zn, as, hg) in the sediments of bamdezh wetland. the main objective of the study is to quantify heavy metal pollution intensity in the wetland. other objectives of the study are separation of natural and anthropogenic heavy metal pollution and identification of the origin of heavy metals. results of this study shows...

2014
Wangming Yang Bing Chen Xuefeng Cui

Anthropogenic heat generated by human activity contributes to urban and regional climate warming. Due to the resolution and accuracy of existing anthropogenic heat data, it is difficult to analyze and simulate the corresponding effects. This study exploited a new method to estimate high spatial and temporal resolutions of anthropogenic heat based on long-term data of energy consumption and the ...

Journal: :The Journal of experimental biology 2011
Dalal Hanna Gabriel Blouin-Demers David R Wilson Daniel J Mennill

Anthropogenic noise can mask animal signals that are crucial for communicating information about food, predators and mating opportunities. In response to noise masking, signallers can potentially improve acoustic signal transmission by adjusting the timing, frequency or amplitude of their signals. These changes can be a short-term modification in response to transient noise or a long-term modif...

2016
Futao Guo Lianjun Zhang Sen Jin Mulualem Tigabu Zhangwen Su Wenhui Wang

Frequent and intense anthropogenic fires present meaningful challenges to forest management in the boreal forest of China. Understanding the underlying drivers of human-caused fire occurrence is crucial for making effective and scientifically-based forest fire management plans. In this study, we applied logistic regression (LR) and Random Forests (RF) to identify important biophysical and anthr...

Journal: :Science 2000
Caldeira Duffy

An ocean-climate model that shows high fluxes of anthropogenic carbon dioxide into the Southern Ocean, but very low storage of anthropogenic carbon there, agrees with observation-based estimates of ocean storage of anthropogenic carbon dioxide. This low simulated storage indicates a subordinate role for deep convection in the present-day Southern Ocean. The primary mechanism transporting anthro...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید