Effects of structural marsh management and salinity on invertebrate prey of waterbirds in marsh ponds during winter on the Gulf Coast Chenier Plain

Bolduc, François V.; Afton, Alan D.

doi:10.1672/0277-5212(2003)023[0897:eosmma]2.0.co;2

Cited by 15 publications

(8 citation statements)

References 37 publications

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“…Reproductive and/or survival rates of cladocerans are generally reduced at higher conductivities (Galat & Robinson 1983). A decrease in the relative abundance of cladocerans in microcrustacean zooplankton as salinity increases has been observed in many aquatic systems (Hurlbert et al 1986, Kingsford & Porter 1994, Moss 1994, Wollheim & Lovvorn 1995, Bolduc & Afton 2003. The lower species richness of Cladocera we CLADOCERANS IN ALICANTE (7) 79 observed in Reserva and Múrtulas was probably related to their high salinities.…”

Section: Discussionmentioning

confidence: 99%

Factors influencing cladoceran abundance and species richness in brackish lakes in Eastern Spain

Green

Fuentes

Moreno‐Ostos

et al. 2005

Ann. Limnol. - Int. J. Lim.

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Section: Discussionmentioning

confidence: 99%

Factors influencing cladoceran abundance and species richness in brackish lakes in Eastern Spain

Green

Fuentes

Moreno‐Ostos

et al. 2005

Ann. Limnol. - Int. J. Lim.

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“…We sampled water-column macroinvertebrates using a D-shaped sweep net with a 30 cm opening and 1 mm mesh size. Many previous studies (Bolduc & Afton 2003, Batzer et al 2004, Nicolet et al 2004, Tarr et al 2005, Hornung & Foote 2006, Kratzer & Batzer 2007 have found a D-shaped sweep net is an effective sampling method for macroinvertebrate sampling in ponds. We conducted a total of 10 continuous sweeps, each of 2 m long (surface covered 6 m 2 ; Bolduc & Afton 2003) at a randomly selected point near the edge of each pond.…”

Section: Aquatic Macroinvertebrate Sampling and Identificationmentioning

confidence: 94%

“…Moreover, water-column macroinvertebrates in coastal marshes are important prey items for predatory fish (Batzer et al 2000) and waterbirds (Bolduc & Afton 2003). Therefore, macroinvertebrate density and biomass can provide important information about potential foraging habitat values for fish and birds.…”

Section: Introductionmentioning

confidence: 99%

Effects of hydrologic connectivity on aquatic macroinvertebrate assemblages in different marsh types

Kang

King²

2013

Aquat. Biol.

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Hydrologic connectivity can be an important driver of aquatic macroinvertebrate assemblages. Its effects on aquatic macroinvertebrate assemblages in coastal marshes, however, are relatively poorly studied. We evaluated the effects of lateral hydrologic connectivity (permanently connected ponds: PCPs; temporary connected ponds: TCPs), and other environmental variables on aquatic macroinvertebrate assemblages and functional feeding groups (FFGs) in freshwater, brackish, and saline marshes in Louisiana, USA. We hypothesized that (1) aquatic macroinvertebrate assemblages in PCPs would have higher assemblage metric values (density, biomass, Shannon-Wiener diversity) than TCPs and (2) the density and proportional abundance of certain FFGs (i.e. scrapers, shredders, and collectors) would be greater in freshwater marsh than brackish and saline marshes. The data in our study only partially supported our first hypothesis: while freshwater marsh PCPs had higher density and biomass than TCPs, assemblage metric values in saline TCPs were greater than saline PCPs. In freshwater TCPs, long duration of isolation limited access of macroinvertebrates from adjacent water bodies, which may have reduced assemblage metric values. However, the relatively short duration of isolation in saline TCPs provided more stable or similar habitat conditions, facilitating higher assemblage metric values. As predicted by our second hypothesis, freshwater PCPs and TCPs supported a greater density of scrapers, shredders, and collectors than brackish and saline ponds. Aquatic macroinvertebrate assemblages seem to be structured by individual taxa responses to salinity as well as pond habitat attributes. KEY WORDS: Coastal marsh · Aquatic macroinvertebrate assemblage · Hydrologic connectivity · Functional feeding groupsResale or republication not permitted without written consent of the publisher

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“…Salinity may interact with hydrology to impact wetland communities. Bolduc and Afton (2003) documented a strong effect of salinity on oligochaetes and nematodes, and found that flooding and anoxia reduced their ability to compensate for salinity stress.…”

Section: àmentioning

confidence: 99%

A global perspective on wetland salinization: ecological consequences of a growing threat to freshwater wetlands

et al. 2015

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Abstract. Salinization, a widespread threat to the structure and ecological functioning of inland and coastal wetlands, is currently occurring at an unprecedented rate and geographic scale. The causes of salinization are diverse and include alterations to freshwater flows, land-clearance, irrigation, disposal of wastewater effluent, sea level rise, storm surges, and applications of de-icing salts. Climate change and anthropogenic modifications to the hydrologic cycle are expected to further increase the extent and severity of wetland salinization. Salinization alters the fundamental physicochemical nature of the soil-water environment, increasing ionic concentrations and altering chemical equilibria and mineral solubility. Increased concentrations of solutes, especially sulfate, alter the biogeochemical cycling of major elements including carbon, nitrogen, phosphorus, sulfur, iron, and silica. The effects of salinization on wetland biogeochemistry typically include decreased inorganic nitrogen removal (with implications for water quality and climate regulation), decreased carbon storage (with implications for climate regulation and wetland accretion), and increased generation of toxic sulfides (with implications for nutrient cycling and the health/functioning of wetland biota). Indeed, increased salt and sulfide concentrations induce physiological stress in wetland biota and ultimately can result in large shifts in wetland communities and their associated ecosystem functions. The productivity and composition of freshwater species assemblages will be highly altered, and there is a high potential for the disruption of existing interspecific interactions. Although there is a wealth of information on how salinization impacts individual ecosystem components, relatively few studies have addressed the complex and often non-linear feedbacks that determine ecosystem-scale responses or considered how wetland salinization will affect landscape-level processes. Although the salinization of wetlands may be unavoidable in many cases, these systems may also prove to be a fertile testing ground for broader ecological theories including (but not limited to): investigations into alternative stable states and tipping points, trophic cascades, disturbance-recovery processes, and the role of historical events and landscape context in driving community response to disturbance.

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Effects of structural marsh management and salinity on invertebrate prey of waterbirds in marsh ponds during winter on the Gulf Coast Chenier Plain

Cited by 15 publications

References 37 publications

Factors influencing cladoceran abundance and species richness in brackish lakes in Eastern Spain

Factors influencing cladoceran abundance and species richness in brackish lakes in Eastern Spain

Effects of hydrologic connectivity on aquatic macroinvertebrate assemblages in different marsh types

A global perspective on wetland salinization: ecological consequences of a growing threat to freshwater wetlands

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