The present study was planned with an objective to detect the level of heavy metals in feathers of House Crow from agrifield areas of district Ludhiana and Sangrur. In feathers of House Crow, 8 heavy metals were detected through ICAP-AES, out of which As, Cd, Pb were heavy metals and Cr, Cu, Ni, Zn, Mn were essential elements. The concentration of all metals varied significantly at .05% level of significance among the different districts.

Pelagic ecosystems are dynamic ocean regions whose immense natural capital is affected by climate change, pollution, and commercial fisheries. Trophic level–based indicators derived from fishery catch data may reveal the food web status of these systems, but the utility of these metrics has been debated because of targeting bias in fisheries catch. We analyze a unique, fishery-independent data set of North Pacific seabird tissues to inform ecosystem trends over 13 decades (1890s to 2010s).

Global warming and direct anthropogenic impacts, such as water extraction, largely affect water budgets in Mediterranean wetlands, thereby increasing wetland salinities and isolation, and decreasing water depths and hydroperiods (duration of the inundation period). These wetland features are key elements structuring waterbird communities. However, the ultimate and net consequences of these dynamic conditions on waterbird assemblages are largely unknown.