Limits...
Variability of polychaete secondary production in intertidal creek networks along a stream-order gradient.

Chu T, Sheng Q, Wang S, Wu J - PLoS ONE (2014)

Bottom Line: Density, biomass, and secondary production of polychaetes were found to be highest in intermediate order creeks.Top fitting AIC models indicated that the secondary production of D. glabra was mainly associated with geomorphological characters including cross-sectional area and bank slope.This study emphasizes the importance of microhabitat variability when evaluating secondary production and ecosystem functions.

View Article: PubMed Central - PubMed

Affiliation: Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, and Institute of Biodiversity Science, Fudan University, Shanghai, China.

ABSTRACT
Dendritic tidal creek networks are important habitats for sustaining biodiversity and ecosystem functioning in salt marsh wetlands. To evaluate the importance of creek heterogeneity in supporting benthic secondary production, we assess the spatial distribution and secondary production of a representative polychaete species (Dentinephtys glabra) in creek networks along a stream-order gradient in a Yangtze River estuarine marsh. Density, biomass, and secondary production of polychaetes were found to be highest in intermediate order creeks. In high order (3rd and 4th) creeks, the density and biomass of D. glabra were higher in creek edge sites than in creek bottom sites, whereas the reverse was true for low order (1st and 2nd) creeks. Secondary production was highest in 2nd order creeks (559.7 mg AFDM m-2 year-1) and was ca. 2 folds higher than in 1st and 4th order creeks. Top fitting AIC models indicated that the secondary production of D. glabra was mainly associated with geomorphological characters including cross-sectional area and bank slope. This suggests that hydrodynamic forces are essential factors influencing secondary production of macrobenthos in salt marshes. This study emphasizes the importance of microhabitat variability when evaluating secondary production and ecosystem functions.

Show MeSH
Monthly density and biomass of Dentinephtys glabra in creeks of different orders.Error bars represent standard error (n = 6). The same letters above the bars denote non-significant differences and different letters represent a significant difference (P<0.05) among creek orders in each month.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4016305&req=5

pone-0097287-g003: Monthly density and biomass of Dentinephtys glabra in creeks of different orders.Error bars represent standard error (n = 6). The same letters above the bars denote non-significant differences and different letters represent a significant difference (P<0.05) among creek orders in each month.

Mentions: The density and biomass of D. glabra are shown in Figure 2, 3 and 4. The density and biomass of D. glabra was highest in the 3rd order creeks (332.0 ind m−2, 296.6 mg AFDM m−2), followed by the 2nd order creeks (283.9 ind m−2, 238.5 mg AFDM m−2) and 1st order creeks (205.6 ind m−2, 183.3 mg AFDM m−2), and were lowest in the 4th order creeks (157.1 ind m−2, 136.3 mg AFDM m−2) (Figure 2). The 3rd order creek had significantly higher densities (P = 0.0002) and biomass (P = 0.0013) of D. glabra than other order creeks. This spatial pattern varied with different sampling months. From May to August, the highest density and biomass of D. glabra occurred in the 2nd order creeks, whereas between September to April levels were highest in the 3rd order creeks (Figure 3).


Variability of polychaete secondary production in intertidal creek networks along a stream-order gradient.

Chu T, Sheng Q, Wang S, Wu J - PLoS ONE (2014)

Monthly density and biomass of Dentinephtys glabra in creeks of different orders.Error bars represent standard error (n = 6). The same letters above the bars denote non-significant differences and different letters represent a significant difference (P<0.05) among creek orders in each month.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4016305&req=5

pone-0097287-g003: Monthly density and biomass of Dentinephtys glabra in creeks of different orders.Error bars represent standard error (n = 6). The same letters above the bars denote non-significant differences and different letters represent a significant difference (P<0.05) among creek orders in each month.
Mentions: The density and biomass of D. glabra are shown in Figure 2, 3 and 4. The density and biomass of D. glabra was highest in the 3rd order creeks (332.0 ind m−2, 296.6 mg AFDM m−2), followed by the 2nd order creeks (283.9 ind m−2, 238.5 mg AFDM m−2) and 1st order creeks (205.6 ind m−2, 183.3 mg AFDM m−2), and were lowest in the 4th order creeks (157.1 ind m−2, 136.3 mg AFDM m−2) (Figure 2). The 3rd order creek had significantly higher densities (P = 0.0002) and biomass (P = 0.0013) of D. glabra than other order creeks. This spatial pattern varied with different sampling months. From May to August, the highest density and biomass of D. glabra occurred in the 2nd order creeks, whereas between September to April levels were highest in the 3rd order creeks (Figure 3).

Bottom Line: Density, biomass, and secondary production of polychaetes were found to be highest in intermediate order creeks.Top fitting AIC models indicated that the secondary production of D. glabra was mainly associated with geomorphological characters including cross-sectional area and bank slope.This study emphasizes the importance of microhabitat variability when evaluating secondary production and ecosystem functions.

View Article: PubMed Central - PubMed

Affiliation: Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, and Institute of Biodiversity Science, Fudan University, Shanghai, China.

ABSTRACT
Dendritic tidal creek networks are important habitats for sustaining biodiversity and ecosystem functioning in salt marsh wetlands. To evaluate the importance of creek heterogeneity in supporting benthic secondary production, we assess the spatial distribution and secondary production of a representative polychaete species (Dentinephtys glabra) in creek networks along a stream-order gradient in a Yangtze River estuarine marsh. Density, biomass, and secondary production of polychaetes were found to be highest in intermediate order creeks. In high order (3rd and 4th) creeks, the density and biomass of D. glabra were higher in creek edge sites than in creek bottom sites, whereas the reverse was true for low order (1st and 2nd) creeks. Secondary production was highest in 2nd order creeks (559.7 mg AFDM m-2 year-1) and was ca. 2 folds higher than in 1st and 4th order creeks. Top fitting AIC models indicated that the secondary production of D. glabra was mainly associated with geomorphological characters including cross-sectional area and bank slope. This suggests that hydrodynamic forces are essential factors influencing secondary production of macrobenthos in salt marshes. This study emphasizes the importance of microhabitat variability when evaluating secondary production and ecosystem functions.

Show MeSH