Untitled

Abstract

The mangrove ecosystem in South Gujarat estuaries constantly reel under the pressure of pollution owing to the rapid industrialization. Hence, this study was carried out to assess the impacts of heavy metals coming into the system through the waste discharges on the overall mangrove health in selected estuaries of the region. The concentrations of different heavy metals such as Pb, Ni, Cr, Cd, Zn, Cu, Fe and Hg were measured in the sediments and tissues of Avicennia marina (Forssk.) Vierh. (Family: Acanthaceae) in seven estuaries of South Gujarat. The results revealed that despite the relatively high heavy metal accumulation (Cr > Cu > Zn > Ni > Pb > Cd > Hg) in the mangrove sediments of the study sites, A. marina plants selectively uptake only Cu and Zn and tend to avoid rest of the heavy metals. The analysis of the mangrove sediments indicated a positive correlation between the organic matter and clay content with the heavy metals. No visible impact of heavy metal on the morphology of the plants could be observed and the present paper discusses how the plants have adopted to the environment.

The effect of problem-based learning and naturalist intelligence on students' understanding of environmental conservation

“…Environmental issues are crucial in this current era (Jianping et al, 2014). Various environmental problems have arisen, such as declining levels of green structures (Roy, Shemdoe, Hulme, Mwageni, & Gough, 2018;Lee et al, 2019), environmental pollution (Dudani, Lakhmapurkar, Gavali, & Patel, 2017;S. Ray & Ray, 2011), decreased food supply (D. K. Ray et al, 2019), and decreasing the land carrying capacity (Roshayanti, Ghofar, Wicaksono, & Budi, 2019;Ichsan, Sigit, Miarsyah, Azrai, & Heryanti, 2019).…”