Seasonal changes in environmental variables, biomass, production and nutrient contents in two contrasting tropical intertidal seagrass beds in South Sulawesi, Indonesia

Drosophila were collected monthly at a south-east Australian orchard site over 30 months. D, melanogaster was predominant in spring-summer, D. simulans in autumn, and D. immigrans in winter. These seasonal changes are consistent with trends described in an earlier study by McKenzie and Parsons (1974). Numbers of the endemic species D. lativittata tended to follow those of D. melanogaster. Comparisons of numbers of each species with environmental variables indicate that D. melanogaster is positively correlated, and D. immigrans negatively correlated, with temperature parameters. D. simulans and D. lativittata numbers were independent of all climatic variables tested. These associations are consistent with collections by McKenzie and Parsons (1974) from an orchard site, but not from their suburban sites. The associations of numbers of adults of each species with climatic variables are only in partial agreement with results from laboratory experiments on stress in adults. Sampling within the orchard indicates that D. melanogaster and D. simulans are differentially associated with fruit resources at both adult and larval stages, with D. melanogaster predominating on peach resources.

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Functional uniformity underlies the common spatial structure of macrofaunal assemblages in intertidal seagrass beds

Biological Journal of the Linnean Society ◽

10.1111/bij.12483 ◽

2015 ◽

Vol 115 (1) ◽

pp. 114-126 ◽

Cited By ~ 14

Author(s):

R. S. K. Barnes ◽

Ian W. Hendy

Keyword(s):

Spatial Structure ◽

Seagrass Beds ◽

The Common ◽

Intertidal Seagrass

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Seasonal Changes in Aboveground Primary Production and Nutrient Contents in a Central New York Typha glauca Ecosystem

Bulletin of the Torrey Botanical Club ◽

10.2307/2484379 ◽

1979 ◽

Vol 106 (1) ◽

pp. 37 ◽

Cited By ~ 12

Author(s):

John M. Bernard ◽

Melissa L. Fitz

Keyword(s):

New York ◽

Primary Production ◽

Seasonal Changes ◽

Nutrient Contents ◽

Central New York ◽

Typha Glauca

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Persisting intertidal seagrass beds in the northern Wadden Sea since the 1930s

Journal of Sea Research ◽

10.1016/j.seares.2012.04.007 ◽

2013 ◽

Vol 82 ◽

pp. 134-141 ◽

Cited By ~ 18

Author(s):

Tobias Dolch ◽

Christian Buschbaum ◽

Karsten Reise

Keyword(s):

Wadden Sea ◽

Seagrass Beds ◽

Intertidal Seagrass

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Relative influence of weather and season on anuran calling activity

Canadian Journal of Zoology ◽

10.1139/cjz-2012-0266 ◽

2013 ◽

Vol 91 (7) ◽

pp. 462-467 ◽

Cited By ~ 11

Author(s):

David A. Steen ◽

Christopher J.W. McClure ◽

Sean P. Graham

Keyword(s):

Seasonal Changes ◽

Environmental Variables ◽

Reproductive Activity ◽

Environmental Variable ◽

Relative Influence ◽

Ephemeral Wetlands ◽

Temperature And Precipitation ◽

South Central ◽

Multiple Hypotheses ◽

Calling Activity

Drivers of anuran reproductive activity may include multiple and independent environmental variables. To determine the relative influence of season, temperature, and precipitation in initiating frog reproduction, we monitored a species-rich frog assemblage in south-central Alabama for 3 years and modeled calling activity of vocalizing males, who call to attract mates. We evaluated multiple hypotheses potentially explaining calling activity and we were able to identify significant influences of calling activity for all 11 anuran species considered in the analysis. Eight species were significantly influenced by month of survey and four of these were influenced by at least one additional environmental variable. In our study, precipitation was relatively unimportant in influencing calling activity, likely because breeding pools at the site are semipermanent and the species we sampled are not generally reliant on ephemeral wetlands. In general, our data suggest that different species within the same wetlands respond to different cues when initiating reproduction and calling activity is largely based on a combination of both environmental conditions and either seasonal changes or endogenous drivers.

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