Spatial and temporal variation in aquatic macroinvertebrates in the Okefenokee Swamp, Georgia, USA

Kratzer, Erika B.; Batzer, Darold P.

doi:10.1672/0277-5212(2007)27[127:satvia]2.0.co;2

Cited by 31 publications

(30 citation statements)

References 23 publications

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“…Our results indicate that with decrease in macrophyte cover, taxon diversity increased but the abundance of each individual family decreased. Macrophyte cover is of great importance as a refuge for macroinvertebrate taxa from predation, offer a substrate for living on and also for laying eggs in water medium (Amakye, 2001;Kratzer, 2002). However, our findings are similar to findings by Mwabvu and Sasa (2009) who observed the same situation in Fletcher Reservoir.…”

Section: Discussionsupporting

confidence: 87%

“…Although species level identification is desirable, family level identification is often the only achievable for studies in Sub-Saharan Africa region. Even though information is lost due poor taxonomic resolution, several studies have demonstrated that family level classification for macroinvertebrates can produce meaningful results (Bailey et al, 2001;Kratzer, 2002;Nhiwatiwa et al, 2009;Kouamé et al, 2011). Relative abundance (%) was calculated as the number of one macroinvertebrate taxa per total number of macroinvertebrates of a given site.…”

Section: > Macroinvertebrate Samplingmentioning

confidence: 99%

“…Macroinvertebrates are the most diverse and abundant organisms in freshwater aquatic systems and are a key component of aquatic ecosystem function (Kratzer, 2002). Macroinvertebrates distribution and community is strongly dependent on the composition and structure of vegetation and macroinvertebrates are recognized as an essential food source for juvenile fish and amphibians in aquatic systems (Takhelmayum and Gupta, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Diverse invertebrate communities exist among the submersed vegetation of ponds, pools and lakes. The abundance of phytophilous invertebrates in an aquatic ecosystem is defined by many factors including macrophyte morphology, substrate texture and epiphytic algal growth, community composition and defensive chemicals (Hann, 1995;Skoroszewski and de Moor, 1999;Kratzer, 2002;Albertoni et al, 2007). Water levels fluctuations occur naturally in lakes and reservoirs as a result of seasonal imbalances between the amounts of water entering via inflow, precipitation, runoff and/or groundwater inputs and water leaving the lake via evaporation, seepage and/or outflow (Zohary and Ostrovsky, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Macroinvertebrate communities associated with littoral zone habitats and the influence of environmental factors in Malilangwe Reservoir, Zimbabwe

Dalu

Clegg

Nhiwatiwa

2012

Knowl. Managt. Aquatic Ecosyst.

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Key-words:Macroinvertebrates, diversity, Malilangwe reservoir, macrophyte cover, conductivity, water levelThe aim of our study was to investigate macroinvertebrate communities so as to understand factors and processes structuring macroinvertebrate communities in a small reservoir, Malilangwe reservoir over seven months (April to October). Sampling was performed by active sweep netting and searching soil sediments. Water temperature, conductivity, dissolved oxygen, pH, ammonia, nitrogen, phosphorus, chemical oxygen demand and macrophyte cover were determined. In total, forty-two macroinvertebrate families belonging to 10 orders were identified amongst 13 macrophyte species and sediments. Thiaridae and Physidae (Mollusca) were the dominant and most abundant taxa (57.71%) and there were followed by the Hemiptera (27.31%). High indices for sites 1 to 3 for the Simpsons index, the Shannon-Weaver index and evenness were recorded, while low indices were observed for sites 4 to 5, with significant differences being observed among the study site using the Kruskal-Wallis ANOVA test (p < 0.05). Redundancy Analysis revealed that among environmental factors, hydrologically linked parameters such as conductivity, water level and macrophyte cover had the strongest influence on macroinvertebrate distribution.

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Section: Discussionsupporting

confidence: 87%

Section: > Macroinvertebrate Samplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Macroinvertebrate communities associated with littoral zone habitats and the influence of environmental factors in Malilangwe Reservoir, Zimbabwe

Dalu

Clegg

Nhiwatiwa

2012

Knowl. Managt. Aquatic Ecosyst.

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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: 95%

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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Macroinvertebrate Community Responses to Annual Flow Variation from River Regulation: An 11‐Year Study

Holt

Pfitzer²,

Scalley³

et al. 2014

River Research & Apps

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The majority of the world's large river systems is affected by dams. The influences of unnatural regimes induced by flow management are wide-ranging from both biotic and abiotic standpoints. However, many of these effects are not evident over short (1-2 years) periods (e.g. impacts of annual flow variation). This study examines the long-term effects of annual flow variation on the macroinvertebrate community in the Chattahoochee River (GA) in the reaches below Buford Dam, the major water control structure on the river. Quarterly, macroinvertebrate samples were taken from 2001 to 2011 using Surber and Hester-Dendy plate samplers at six locations spread across 65 km below the dam. Data were analysed via analysis of similarities to determine differences in community composition between high-flow (mean discharge = 58.27 m 3 /s) and low-flow (mean discharge = 26.53 m 3 /s) years. Taxa that contributed most to community differences were determined via similarity percentages analyses and subsequent t-tests. Several insect taxa (e.g. Cheumatopsyche and Ceratopsyche caddisfly larvae, Maccaffertium mayfly nymphs and Taeniopteryx stonefly nymphs) were more prevalent under the high-flow regime. Non-insect macroinvertebrates (e.g. Crangonyx amphipods, Tricladida flatworms and Caecidotea isopods) were more abundant under low-flow conditions. In terms of taxon richness, no significant effects of flow regime were detected. Implications of macroinvertebrate patterns for the fishery and ecological health of the river are discussed.

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Spatial and temporal variation in aquatic macroinvertebrates in the Okefenokee Swamp, Georgia, USA

Cited by 31 publications

References 23 publications

Macroinvertebrate communities associated with littoral zone habitats and the influence of environmental factors in Malilangwe Reservoir, Zimbabwe

Macroinvertebrate communities associated with littoral zone habitats and the influence of environmental factors in Malilangwe Reservoir, Zimbabwe

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

Macroinvertebrate Community Responses to Annual Flow Variation from River Regulation: An 11‐Year Study

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