A review of anthropogenic sources of nitrogen and their effects on Canadian aquatic ecosystems

2006 ◽  
Vol 79 (1-2) ◽  
pp. 25-44 ◽  
Author(s):  
David W. Schindler ◽  
Peter J. Dillon ◽  
Hans Schreier
Keyword(s):  
Aquatic Ecosystems ◽  
Anthropogenic Sources

210Po, 210Pb, 226Ra in Aquatic Ecosystems and Polders, Anthropogenic Sources, Distribution and Enhanced Radiation Doses in the Netherlands

1992 ◽  
Vol 45 (1-4) ◽  
pp. 715-719 ◽  
Author(s):  
H.W. Köster ◽  
P.A. Marwitz ◽  
G.W. Berger ◽  
A.W. Van Weers ◽  
P. Hagel ◽  
...  
Keyword(s):  
The Netherlands ◽  
Aquatic Ecosystems ◽  
Anthropogenic Sources ◽  
Radiation Doses

scholarly journals Heavy Metal Accumulation in Rice and Aquatic Plants Used as Human Food: A General Review

Toxics ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 360
Author(s):  
Mohammad Main Uddin ◽  
Mohamed Cassim Mohamed Zakeel ◽  
Junaida Shezmin Zavahir ◽  
Faiz M. M. T. Marikar ◽  
Israt Jahan
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Human Health ◽  
Aquatic Plants ◽  
Aquatic Ecosystems ◽  
Metal Accumulation ◽  
Heavy Metal Accumulation ◽  
Mitigation Strategies ◽  
Anthropogenic Sources ◽  
Aquatic Environments

Aquatic ecosystems are contaminated with heavy metals by natural and anthropogenic sources. Whilst some heavy metals are necessary for plants as micronutrients, others can be toxic to plants and humans even in trace concentrations. Among heavy metals, cadmium (Cd), arsenic (As), chromium (Cr), lead (Pb), and mercury (Hg) cause significant damage to aquatic ecosystems and can invariably affect human health. Rice, a staple diet of many nations, and other aquatic plants used as vegetables in many countries, can bioaccumulate heavy metals when they grow in contaminated aquatic environments. These metals can enter the human body through food chains, and the presence of heavy metals in food can lead to numerous human health consequences. Heavy metals in aquatic plants can affect plant physicochemical functions, growth, and crop yield. Various mitigation strategies are being continuously explored to avoid heavy metals entering aquatic ecosystems. Understanding the levels of heavy metals in rice and aquatic plants grown for food in contaminated aquatic environments is important. Further, it is imperative to adopt sustainable management approaches and mitigation mechanisms. Although narrowly focused reviews exist, this article provides novel information for improving our understanding about heavy metal accumulation in rice and aquatic plants, addressing the gaps in literature.

210Po, 210Pb, 226Ra in Aquatic Ecosystems and Polders, Anthropogenic Sources, Distribution and Enhanced Radiation Doses in the Netherlands

1992 ◽  
Vol 45 (1-4) ◽  
pp. 715-719 ◽  
Author(s):  
H.W. Köster ◽  
P.A. Marwitz ◽  
G.W. Berger ◽  
A.W. Van Weers ◽  
P. Hagel ◽  
...  
Keyword(s):  
The Netherlands ◽  
Aquatic Ecosystems ◽  
Anthropogenic Sources ◽  
Radiation Doses

Habitat fragmentation causes collapse of kelp recruitment

2020 ◽  
Vol 648 ◽  
pp. 111-123
Author(s):  
C Layton ◽  
MJ Cameron ◽  
M Tatsumi ◽  
V Shelamoff ◽  
JT Wright ◽  
...  
Keyword(s):  
Habitat Fragmentation ◽  
Patch Size ◽  
Life Stage ◽  
Extended Period ◽  
Anthropogenic Disturbances ◽  
Anthropogenic Sources ◽  
Kelp Forests ◽  
Natural Disturbances ◽  
Short Term ◽  
Turf Algae

Kelp forests in many regions are experiencing disturbance from anthropogenic sources such as ocean warming, pollution, and overgrazing. Unlike natural disturbances such as storms, anthropogenic disturbances often manifest as press perturbations that cause persistent alterations to the environment. One consequence is that some kelp forests are becoming increasingly sparse and fragmented. We manipulated patch size of the kelp Ecklonia radiata over 24 mo to simulate persistent habitat fragmentation and assessed how this influenced the demography of macro- and microscopic juvenile kelp within the patches. At the beginning of the experiment, patch formation resulted in short-term increases in E. radiata recruitment in patches <1 m2. However, recruitment collapsed in those same patches over the extended period, with no recruits observed after 15 mo. Experimental transplants of microscopic and macroscopic juvenile sporophytes into the patches failed to identify the life stage impacted by the reductions in patch size, indicating that the effects may be subtle and require extended periods to manifest, and/or that another life stage is responsible. Abiotic measurements within the patches indicated that kelp were less able to engineer the sub-canopy environment in smaller patches. In particular, reduced shading of the sub-canopy in smaller patches was associated with proliferation of sediments and turf algae, which potentially contributed to the collapse of recruitment. We demonstrate the consequences of short- and longer-term degradation of E. radiata habitats and conclude that habitat fragmentation can lead to severe disruptions to kelp demography.

Sanitary-Hydrobiological Characteristics of Aquatic Ecosystems in terms of Microphytobenthos

2011 ◽  
Vol 47 (6) ◽  
pp. 63-74
Author(s):  
O. P. Oksiyuk ◽  
O. A. Davydov
Keyword(s):  
Aquatic Ecosystems

Use of the Indices of Macrozoobenthos Diversity as Indicators of the State of Aquatic Ecosystems

2003 ◽  
Vol 39 (4) ◽  
pp. 16-25 ◽  
Author(s):  
A. V. Lyashenko ◽  
A. A. Protasov
Keyword(s):  
Aquatic Ecosystems ◽  
The State
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