scholarly journals Spatial trends in community richness, diversity, and evenness across rocky intertidal environmental stress gradients in eastern Canada

2007 ◽  
Vol 342 ◽  
pp. 1-14 ◽  
Author(s):  
R Scrosati ◽  
C Heaven
Keyword(s):  
Environmental Stress ◽  
Rocky Intertidal ◽  
Eastern Canada ◽  
Stress Gradients ◽  
Spatial Trends

Lake pH and aluminum concentration: consequences for developmental stability of the water strider Rheumatobates rileyi (Hemiptera: Gerridae)

1999 ◽  
Vol 77 (1) ◽  
pp. 157-161
Author(s):  
S Drover ◽  
B Leung ◽  
M R Forbes ◽  
M L Mallory ◽  
D K McNicol
Keyword(s):  
Environmental Stress ◽  
Aquatic Organisms ◽  
Cost Effective ◽  
Developmental Stability ◽  
Aluminum Concentration ◽  
Water Strider ◽  
Eastern Canada ◽  
Effective Measure ◽  
Water Striders ◽  
Lake Acidity

Lake acidity and metal contamination are environmental stresses that negatively affect many aquatic organisms in lakes in eastern Canada. Developmental stability, as indexed by fluctuating asymmetry (FA), is a putative cost-effective measure of environmental stress. In this study, we measured FA of the water strider Rheumatobates rileyi (L.) in lakes in the Sudbury area in relation to lake acidity (pH) and aluminum concentration. We did this to test the prediction that water striders inhabiting degraded lakes (low pH or high Al concentration) would exhibit decreased developmental stability (increased FA) compared with water striders from circumneutral lakes. As predicted we found that Al concentration (corrected for pH) was positively related to the average FA of samples. Contrary to expectation we found that pH (corrected for Al concentration) was also positively related to FA; thus, for a given Al concentration, more acid lakes had more symmetrical water striders than expected. We discuss the importance of our findings in relation to the use of FA as an index of environmental stress, for both water striders and other organisms.

Tracking environmental stress gradients using three biotic integrity indices: Advantages of a locally-developed traits-based approach

2013 ◽  
Vol 34 ◽  
pp. 560-570 ◽  
Author(s):  
I.F. Rodil ◽  
A.M. Lohrer ◽  
J.E. Hewitt ◽  
M. Townsend ◽  
S.F. Thrush ◽  
...  
Keyword(s):  
Environmental Stress ◽  
Biotic Integrity ◽  
Stress Gradients

PHYSIOLOGY OF THE ROCKY INTERTIDAL PREDATORNUCELLA OSTRINAALONG AN ENVIRONMENTAL STRESS GRADIENT

Ecology ◽  
2001 ◽  
Vol 82 (10) ◽  
pp. 2816-2829 ◽  
Author(s):  
Elizabeth P. Dahlhoff ◽  
Bradley A. Buckley ◽  
Bruce A. Menge
Keyword(s):  
Environmental Stress ◽  
Stress Gradient ◽  
Rocky Intertidal

Corrigendum to: Temporal patterns of gastropod egg mass deposition on southeastern Australian shores

2008 ◽  
Vol 59 (7) ◽  
pp. 652
Author(s):  
Rachel Przeslawski
Keyword(s):  
Environmental Stress ◽  
Food Availability ◽  
Temporal Patterns ◽  
Rocky Intertidal ◽  
Egg Mass ◽  
Larval Food ◽  
Intrinsic Factors ◽  
Developmental Mode ◽  
Eastern Australia ◽  
Taxonomic Order

Spawning of marine invertebrates may be affected by environmental factors (e.g. food availability, environmental stress) or intrinsic factors (e.g. phylogenetic constraints, developmental mode); intrinsic factors may obscure environmental effects. Two-year surveys of gastropod egg mass deposition were conducted at two rocky intertidal sites in south-eastern Australia to test the following hypotheses: (1) temporal patterns of spawning are more similar within taxonomic order than across orders; and (2) species with planktotrophic larvae are more likely to spawn in seasons coinciding with maximum food availability. There were no discernible effects of either order or developmental mode on spawning patterns, suggesting that spawning behaviour is unrelated to taxonomic order or larval food availability. Alternatively, low numbers of species in certain groups may have increased the risk of not detecting significant effects (type II error). Comparisons with anecdotal data from other regions suggest that developmental mode may indeed play a role in marine gastropod spawning. Criteria are provided for future comparative studies, including a direct focus on specific families and the inclusion of similar latitudes and habitats to those used here. Such studies will help to determine the roles of developmental mode, food availability and environmental stress in the evolution of egg mass deposition.

Biodiversity effects on ecosystem functioning change along environmental stress gradients

2013 ◽  
Vol 16 (4) ◽  
pp. 568-569 ◽  
Author(s):  
Bastian Steudel ◽  
Andy Hector ◽  
Thomas Friedl ◽  
Christian Löfke ◽  
Maike Lorenz ◽  
...  
Keyword(s):  
Environmental Stress ◽  
Ecosystem Functioning ◽  
Stress Gradients ◽  
Biodiversity Effects
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