The Hg geochemistry of a geothermal stream, Steamboat Creek, Nevada: natural vs. anthropogenic influences

1998 ◽  
Vol 34 (2-3) ◽  
pp. 143-150 ◽  
Author(s):  
W. B. Lyons ◽  
D. M. Wayne ◽  
J. J. Warwick ◽  
G. A. Doyle
Keyword(s):  
Anthropogenic Influences ◽  
Steamboat Creek

scholarly journals Environmental and anthropogenic influences on spatiotemporal dynamics of Alosa in Chesapeake Bay tributaries

Ecosphere ◽  
2021 ◽  
Vol 12 (6) ◽  
Author(s):  
Rujia Bi ◽  
Yan Jiao ◽  
L. Alan Weaver ◽  
Bob Greenlee ◽  
Genine McClair ◽  
...  
Keyword(s):  
Chesapeake Bay ◽  
Spatiotemporal Dynamics ◽  
Anthropogenic Influences

Anthropogenic Influences on Annual Flux of Cations and Anions at Meio Stream Basin, São Paulo State, Brazil

2009 ◽  
Vol 205 (1-4) ◽  
pp. 79-91 ◽  
Author(s):  
F. T. Conceição ◽  
D. S. Sardinha ◽  
A. D. G. Souza ◽  
G. R. B. Navarro
Keyword(s):  
Sao Paulo ◽  
Anthropogenic Influences ◽  
São Paulo ◽  
Paulo State ◽  
São Paulo State ◽  
Annual Flux

Coral trace metal of natural and anthropogenic influences in the northern South China Sea

2017 ◽  
Vol 607-608 ◽  
pp. 195-203 ◽  
Author(s):  
Wei Jiang ◽  
Ke-Fu Yu ◽  
Yin-Xian Song ◽  
Jian-Xin Zhao ◽  
Yue-Xing Feng ◽  
...  
Keyword(s):  
South China Sea ◽  
Trace Metal ◽  
South China ◽  
Northern South China Sea ◽  
Anthropogenic Influences ◽  
China Sea

scholarly journals Siltation rate and main anthropic impacts on sedimentation of the São Luís tidal inlet - State of Maranhão, Brazil

2016 ◽  
Vol 64 (1) ◽  
pp. 9-18 ◽  
Author(s):  
James Werllen de Jesus Azevedo ◽  
Antonio Carlos Leal de Castro ◽  
Marcio Costa Fernandes Vaz dos Santos
Keyword(s):  
Coastal Management ◽  
Land Reclamation ◽  
Morphological Evolution ◽  
Urban Expansion ◽  
Tidal Inlet ◽  
Sedimentation Rates ◽  
Anthropogenic Influences ◽  
Aerial Photos ◽  
Management Policies ◽  
Deposition Processes

Abstract In recent decades, intense human intervention in the coastal zone has given rise to severe siltation and erosion problems. This scenario is located the São Luís tidal inlet, formed by the mouths of the Anil and Bacanga rivers which due to various kinds of interference have been changing their sediment transport and deposition processes. With these changes in mind, this study sought to evaluate the evolution of the siltation and sedimentation rates in this area, as well as the main anthropogenic influences associated with this process. The methodology consisted in verifying the morphological evolution on the basis of the scanning and vectorization of nautical charts of 1947 and 1966, bathymetric surveys conducted in 2006, and aerial photos dating from 2011. The results show a silting up process coincident with interventions that occurred in the Anil and Bacanga river basins, with a volume of silt estimated at 8.5x106 m3, over the period from 1944 to 2011 (64 years), at a rate of 1.6 cm.yr-1. These processes are associated mainly with the construction of the Bacanga dam and land reclamation projects undertaken for the purpose of providing new areas for urban expansion. The evaluation of the results showed intense and advanced silting up of the São Luís tidal inlet, at rates proportionally greater than those of other estuaries, calling for corrective actions and the implementation of coastal management policies for this area.

scholarly journals Community Arctio-Artemisetum vulgaris (Tx. 1942) Oberd. et al. 1967.: The most widespread ruderal community at Pancevacki rit

2009 ◽  
Vol 24 (2) ◽  
pp. 113-121
Author(s):  
Radmila Stankovic-Kalezic ◽  
Slobodan Jovanovic ◽  
Vaskrsija Janjic ◽  
Ljiljana Radivojevic
Keyword(s):  
Floristic Composition ◽  
Anthropogenic Influences ◽  
Composition And Structure

A several-year investigation of distribution, phytocoenological differentiation, floristic composition and structure of the ruderal flora and vegetation, and relative anthropogenic influences was conducted in the area of Pancevacki rit. The study focused on the ruderal community Arctio-Artemisetum vulgaris, the most widespread of 10 ruderal communities identified in a detailed phytocoenological analysis of the location of Pancevacki rit.

scholarly journals Plant carbohydrate content limits performance and lipid accumulation of an outbreaking herbivore

2020 ◽  
Vol 287 (1940) ◽  
pp. 20202500
Author(s):  
Stav Talal ◽  
Arianne J. Cease ◽  
Jacob P. Youngblood ◽  
Ruth Farington ◽  
Eduardo V. Trumper ◽  
...  
Keyword(s):  
Ecological Factors ◽  
South American ◽  
Anthropogenic Influences ◽  
Artificial Diets ◽  
Lipid Contents ◽  
Structural Carbohydrate ◽  
Survival And Growth ◽  
Total Body ◽  
Local Plants ◽  
And Migration

Locusts are major intermittent threats to food security and the ecological factors determining where and when these occur remain poorly understood. For many herbivores, obtaining adequate protein from plants is a key challenge. We tested how the dietary protein : non-structural carbohydrate ratio (p : c) affects the developmental and physiological performance of 4th-5th instar nymphs of the South American locust, Schistocerca cancellata, which has recently resurged in Argentina, Bolivia and Paraguay. Field marching locusts preferred to feed on high carbohydrate foods. Field-collected juveniles transferred to the laboratory selected artificial diets or local plants with low p : c. On single artificial diets, survival rate increased as foods became more carbohydrate-biased. On single local plants, growth only occurred on the plant with the lowest p : c. Most local plants had p : c ratios substantially higher than optimal, demonstrating that field marching locusts must search for adequate carbohydrate or their survival and growth will be carbohydrate-limited. Total body lipids increased as dietary p : c decreased on both artificial and plant diets, and the low lipid contents of field-collected nymphs suggest that obtaining adequate carbohydrate may pose a strong limitation on migration for S. cancellata . Anthropogenic influences such as conversions of forests to pastures, may increase carbohydrate availability and promote outbreaks and migration of some locusts.

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