scholarly journals Subtropical Coastal Lagoon from Southern Brazil: Environmental Conditions and Phytobenthic Community Structure

2020 ◽  
Author(s):  
Leticia Donadel ◽  
Lezilda Torgan
Keyword(s):  
Community Structure ◽  
Coastal Lagoon ◽  
Environmental Conditions ◽  
Southern Brazil

Dissolved oxygen and temperature best predict deep-sea fish community structure in the Gulf of California with climate change implications

2020 ◽  
Vol 637 ◽  
pp. 159-180
Author(s):  
ND Gallo ◽  
M Beckwith ◽  
CL Wei ◽  
LA Levin ◽  
L Kuhnz ◽  
...  
Keyword(s):  
Climate Change ◽  
Community Structure ◽  
Community Composition ◽  
Environmental Conditions ◽  
Deep Sea ◽  
Gulf Of California ◽  
Fish Community ◽  
Demersal Fish ◽  
Fish Community Structure ◽  
Explained Variance

Natural gradient systems can be used to examine the vulnerability of deep-sea communities to climate change. The Gulf of California presents an ideal system for examining relationships between faunal patterns and environmental conditions of deep-sea communities because deep-sea conditions change from warm and oxygen-rich in the north to cold and severely hypoxic in the south. The Monterey Bay Aquarium Research Institute (MBARI) remotely operated vehicle (ROV) ‘Doc Ricketts’ was used to conduct seafloor video transects at depths of ~200-1400 m in the northern, central, and southern Gulf. The community composition, density, and diversity of demersal fish assemblages were compared to environmental conditions. We tested the hypothesis that climate-relevant variables (temperature, oxygen, and primary production) have more explanatory power than static variables (latitude, depth, and benthic substrate) in explaining variation in fish community structure. Temperature best explained variance in density, while oxygen best explained variance in diversity and community composition. Both density and diversity declined with decreasing oxygen, but diversity declined at a higher oxygen threshold (~7 µmol kg-1). Remarkably, high-density fish communities were observed living under suboxic conditions (<5 µmol kg-1). Using an Earth systems global climate model forced under an RCP8.5 scenario, we found that by 2081-2100, the entire Gulf of California seafloor is expected to experience a mean temperature increase of 1.08 ± 1.07°C and modest deoxygenation. The projected changes in temperature and oxygen are expected to be accompanied by reduced diversity and related changes in deep-sea demersal fish communities.

Community structure, succession and invasibility in a seasonal deciduous forest in southern Brazil

2014 ◽  
Vol 17 (6) ◽  
pp. 1697-1712 ◽  
Author(s):  
M. S. Dechoum ◽  
T. T. Castellani ◽  
S. M. Zalba ◽  
M. Rejmánek ◽  
N. Peroni ◽  
...  
Keyword(s):  
Community Structure ◽  
Deciduous Forest ◽  
Southern Brazil

Status of corals along the Sindh coast of Pakistan: Prevailing environmental conditions, their impacts on community structure and conservation approaches

2020 ◽  
Vol 39 ◽  
pp. 101391
Author(s):  
Amjad Ali ◽  
Pirzada Jamal A. Siddiqui ◽  
Munawwer Rasheed ◽  
Naveed Ahmad ◽  
Seema Shafique ◽  
...  
Keyword(s):  
Community Structure ◽  
Environmental Conditions

Major Ion Chemistry in a Freshwater Coastal Lagoon from Southern Brazil (Mangueira Lagoon): Influence of Groundwater Inputs

2008 ◽  
Vol 14 (2) ◽  
pp. 133-146 ◽  
Author(s):  
Isaac R. Santos ◽  
Maria I. Machado ◽  
Luis F. Niencheski ◽  
William Burnett ◽  
Idel B. Milani ◽  
...  
Keyword(s):  
Coastal Lagoon ◽  
Southern Brazil ◽  
Ion Chemistry ◽  
Major Ion Chemistry ◽  
Major Ion
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