دانلود رایگان مقاله انگلیسی نشانه اثرات آفت کش ها و بازگرداندن آنها در جریان - الزویر 2018

عنوان فارسی
نشانه اثرات آفت کش ها و بازگرداندن آنها در جریان
عنوان انگلیسی
Indication of pesticide effects and recolonization in streams
صفحات مقاله فارسی
0
صفحات مقاله انگلیسی
9
سال انتشار
2018
نشریه
الزویر - Elsevier
فرمت مقاله انگلیسی
PDF
نوع مقاله
ISI
نوع نگارش
مقالات پژوهشی (تحقیقاتی)
رفرنس
دارد
پایگاه
اسکوپوس
کد محصول
E9718
رشته های مرتبط با این مقاله
مهندسی کشاورزی
گرایش های مرتبط با این مقاله
شناسایی و مبارزه با علف های هرز
مجله
علم محیط زیست - Science of the Total Environment
دانشگاه
UFZ - Helmholtz Centre for Environmental Research - Department System-Ecotoxicology - Germany
کلمات کلیدی
مناطق حفاظت شده، Recolonization، نیزه، آفت کش ها، جریان آب شیرین
doi یا شناسه دیجیتال
https://doi.org/10.1016/j.scitotenv.2018.02.056
چکیده

abstract


The agricultural use of pesticides leads to environmentally relevant pesticide concentrations that cause adverse effects on stream ecosystems. These effects on invertebrate community composition can be identified by the bio-indicator SPEARpesticides. However, refuge areas have been found to partly confound the indicator. On the basis of three monitoring campaigns of 41 sites in Central Germany, we identified 11 refuge taxa. The refuge taxa, mainly characterized by dispersal-based resilience, were observed only nearby uncontaminated stream sections and independent of the level of pesticide pressure. Through incorporation of this information into the revised SPEARpesticides indicator, the community structure specifically identified the toxic pressure and no longer depended on the presence of refuge areas. With regard to ecosystem functions, leaf litter degradation was predicted by the revised SPEARpesticides and the median water temperature at a site (R2 = 0.38, P = 0.003). Furthermore, we designed the bio-indicator SPEARrefuge to quantify the magnitude of general recolonization at a given stream site. We conclude that the taxonomic composition of aquatic invertebrate communities enables a specific indication of anthropogenic stressors and resilience of ecosystems.

نتیجه گیری

5. Conclusion


Stressor-specific ecological indicators are essential for the monitoring of ecosystems, because they reveal ecological effects and assess the potential of single and combined stressors to affect ecosystem structure and function. The revised SPEARpesticides is applicable as a highly specific indicator for revealing the toxic pressure of pesticides and corresponding effects on aquatic invertebrates.


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