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1.
New birds on the block: new neighbors increase defensive costs for territorial male willow ptarmigan 总被引:4,自引:0,他引:4
Previous researchers have hypothesized that site-faithful animals may benefit from the presence of familiar neighbors. This study compares the relative costs of territorial defense against new and former neighbors by male willow ptarmigan (Lagopus lagopus). Territorial defense against new neighbors appeared to require a greater expenditure of both time and effort than did defense against former neighbors. Territorial males that had several new neighbors spent a higher proportion of time fighting than did males with fewer new neighbors, and males with both new and former neighbors spent a greater amount of time fighting with their new neighbors, on average, than with their former neighbors. In addition, fights with new neighbors occurred relatively more frequently and were longer than fights with former neighbors. Finally, fights involving new neighbors tended to escalate to higher levels than fights between former neighbors. Reduced defensive costs for site-faithful, territorial males may provide one explanation for the tendency of males to be more site-faithful than females in many species. 相似文献
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上海部分城市污水处理厂现状调查 总被引:5,自引:0,他引:5
钱瑾 《环境监测管理与技术》1997,9(3):22-24
对上海市部分城市水污水处理厂的工艺特点,处理能力,污染物去除率,废水排放达标率进行了调查与分析,指出,必须加强对城市污水处理厂的监督监测,并就污水处理厂的建设,改造提出了一些建议。 相似文献
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通过参观学习提高自身认识,拓思路,产生构想,为做好本职工作奠定了基础,增强了信心。 相似文献
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洛阳分公司恶臭污染调查及防治 总被引:2,自引:0,他引:2
程俊梅 《石油化工环境保护》2005,28(1):31-33,i002
分析了洛阳分公司恶臭污染源,提出了解决恶臭污染的常用方法及对洛阳分公司恶臭污染源的控制及治理途径。 相似文献
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碳酸锶废水对生态环境的影响调查及治理方案 总被引:3,自引:0,他引:3
碳酸锶因电子工业飞速发展而身价百倍,但其生产废水的直接排放则造成了严重的环境污染,本文通过对水体、农业、渔业、人体健康和水生生物等多种因素调查,掌握了碳酸锶废水污染成因,同时提出了资源再利用方案。 相似文献
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采用综合污染指数法对锦州市农村两家畜禽养殖场区周边土壤监测数据进行评估,分析了畜禽粪便对畜禽养殖场周边土壤中重金属污染的影响。 相似文献
10.
Phillip N. Price Curtis M. Oldenburg 《International Journal of Greenhouse Gas Control》2009,3(5):658-663
Geologic carbon sequestration is the injection of anthropogenic CO2 into deep geologic formations where the CO2 is intended to remain indefinitely. If successfully implemented, geologic carbon sequestration will have little or no impact on terrestrial ecosystems aside from the mitigation of climate change. However, failure of a geologic carbon sequestration site, such as large-scale leakage of CO2 into a potable groundwater aquifer, could cause impacts that would require costly remediation measures. Governments are attempting to develop regulations for permitting geologic carbon sequestration sites to ensure their safety and effectiveness. At present, these regulations focus largely on decreasing the probability of failure. In this paper we propose that regulations for the siting of early geologic carbon sequestration projects should emphasize limiting the consequences of failure because consequences are easier to quantify than failure probability. 相似文献