Trophic Status of Southeastern Lake Michigan Based on the Chironomidae (Diptera)

Winnell, Michael H.; White, David S.

doi:10.1016/s0380-1330(85)71798-4

Cited by 18 publications

(9 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chironomid larvae are also sensitive to changes in the organic content of bottom sediments (Larocque et al, 2001;Bigler et al, 2006;Porinchu et al, 2007) because it affects their feeding (McGarrigle, 1980;Winnell & White, 1985;Pinder, 1986) and burrowing (Danks, 1971). In the surveyed Rwenzori lakes and pools, sedimentary organic content (LOI) and temperature co-vary strongly (Fig.…”

Section: Magnitude Of Historical Temperature Changementioning

confidence: 99%

Limnological and ecological sensitivity of Rwenzori mountain lakes to climate warming

et al. 2010

View full text Add to dashboard Cite

An increasing number of studies forecast that anthropogenic climate change poses serious consequences for the biodiversity and ecosystem functioning of high-elevation mountain lakes, through a series of both direct and indirect effects. The impacts of future climate warming on alpine ecosystems are of particular concern, given that warming is expected to be most pronounced at high elevations around the globe. Here, we evaluate the limnological and ecological sensitivity of high-elevation lakes in the Rwenzori Mountains (Uganda-D. R. Congo) to climate change. This is done by comparing the species assemblages of larval chironomid remains deposited recently in lake sediments with those deposited at the base of short cores (dated to within or shortly after the Little Ice Age) in 16 lakes. Chironomid-based reconstructions of mean annual air temperature (MATemp) are made using a variety of inference models (with transfer functions based on weighted averaging, weighted-averaging partial least squares, and a weighted modern analogue technique), and two different calibration data sets, one covering the full regional temperature gradient and one comprising only high-elevation Rwenzori lakes and ponds. The reconstructed historical temperature change ranges between a cooling of -2.03A degrees C and a warming of +3.22A degrees C (with n = 16 lakes x 3 models x 2 calibration data sets). However, excluding the atypical mid-elevation lake Mahoma (2,990 m altitude), we find a three-to-one ratio of cases of inferred warming against inferred cooling, and of the 24 Delta MATemp values exceeding 0.60A degrees C, 23 are positive and only one is negative. Chironomid-inferred temperature changes mostly fall within the error range of the regional temperature inference models. A generalized linear mixed model analysis of the combined result from all lakes (except Mahoma) nevertheless indicates significantly warmer MATemp (on average +0.38 +/- A 0.11A degrees C) at present compared to between similar to 85 and similar to 645 years ago. Inferred temperature changes are independent of whether lakes are located in glaciated or non-glaciated catchments, and of the age of the core base, suggesting that at least part of the signal is due to relatively recent, anthropogenic warming. The direction of faunal change at the lakes in relation to established species-environment relationships suggests that part of the observed shifts in species composition reflect lake-specific evolution in habitat features other than temperature, such as nutrients, pH or oxygen regime, which in our present calibration data set co-vary with temperature to a greater or lesser extent. The fairly uniform and marked historical warming trend in Rwenzori lakes documented by this study highlights their ecological vulnerability and their value as early warning systems for detecting the limnological and ecological effects of global warming

show abstract

Section: Magnitude Of Historical Temperature Changementioning

confidence: 99%

Limnological and ecological sensitivity of Rwenzori mountain lakes to climate warming

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Group 0 includes species characteristic of oligotrophic conditions, Group 1 contains species typically found in mesotrophic or slightly enriched conditions, and Group 2 comprises species known to be tolerant of eutrophic or considerably enriched conditions. The trophic tolerance of species follows that of Winnell and White (1985). When a species was encountered that was not classified in Winnell and White (1985), the biotic index by Hilsenhoff (1987) and regional tolerance values from Barbour et al (1999) were used to make classifications.…”

Section: Fig 1 Sites Sampled In Muskegon Lake In Fall 1999 Arrows mentioning

confidence: 99%

“…The trophic tolerance of species follows that of Winnell and White (1985). When a species was encountered that was not classified in Winnell and White (1985), the biotic index by Hilsenhoff (1987) and regional tolerance values from Barbour et al (1999) were used to make classifications. Classification schemes of both Hilsenhoff (1987) and Barbour et al (1999) were on a ten-point scale and were partitioned among the ecological groups within the TCI.…”

Section: Fig 1 Sites Sampled In Muskegon Lake In Fall 1999 Arrows mentioning

confidence: 99%

“…While there were some differences in the time of year collections were made (June in 1972 vs. October/November in 1999) and mesh size used (0.6 mm in 1972 vs. 0.5 mm in 1999) between the two studies, we believe these differences played a minor role in the large density increases observed in 1999. In the Great Lakes region, increased densities of certain macroinvertebrates (especially oligochaetes) have been considered indicative of degraded conditions or nutrient enrichment (Carr and Hiltunen 1965, Krieger 1984, Nalepa 1987, Winnell and White 1985. In lake systems, organic material from autochthonous and allochthonous sources settles to the bottom and serves as food for the benthos, leading to density increases.…”

Section: Table 8 Mean (± Standard Error) Heavy Metal Concentrations mentioning

confidence: 99%

See 1 more Smart Citation

Status and Trends of Benthic Populations in a Coastal Drowned River Mouth Lake of Lake Michigan

Carter

Nalepa

Rediske

2006

Journal of Great Lakes Research

View full text Add to dashboard Cite

Muskegon Lake was designated an Area of Concern because of severe environmental impairments from direct discharge of industrial and municipal wastes. Since diversion of all municipal and industrial wastewater in 1973, few studies have assessed ecological changes associated with improved water quality. We examined distributions and long-term changes in the benthic macroinvertebrate community at 27 sites. Distributions were evaluated relative to distance from the river mouth, water depth, grain size, and known areas of sediment contamination. Temporal changes were assessed relative to wastewater diversion. Oligochaeta and Chironomidae dominated the community, and the oligochaete trophic condition index indicated that, in 1999, the lake was generally mesotrophic to eutrophic. Cluster analysis resulted in four distinct site groupings. A cluster of sites near the river mouth had the highest total density (9,375 m -2 ) and lowest diversity (Shannon Weaver Index 1.05) suggesting an enriched habitat. A site cluster in the south central region had the lowest oligochaete density (2,782 m -2 ), lowest oligochaete trophic condition index scores (1.00), and highest diversity (2.24), suggesting the best habitat. The chironomid community in this site cluster was dominated by predatory species, possibly resulting from high concentrations of heavy metals at some sites. Densities of all major taxonomic groups increased significantly between 1972 and 1999. Decreasing proportions of oligochaetes (0.85 to 0.68) and increasing diversity suggest improved environmental conditions over this period. Evidence suggests that changes in Muskegon Lake's benthic community were more a result of wastewater diversion than Dreissena invasion.

show abstract

“…Other factors that are important in affecting the distribution of chironomids within the aquatic environment include the quantity and quality of food, intra-and interspecific competition and species-specific physiological adaptations. A number of studies have identified substrate as an important determinant of chironomid community composition and species distribution (McGarrigle, 1980;Pinder, 1980;Winnell and White, 1985). Chironomid species tend to be associated with particular substrates during their larval stage.…”

Section: Habitatmentioning

confidence: 99%

The use and application of freshwater midges (Chironomidae: Insecta: Diptera) in geographical research

Porinchu

MacDonald

2003

prog phys geogr

View full text Add to dashboard Cite

The potential of applying the analysis of freshwater midges (Chironomidae) for current questions in geographical research is examined. Chironomids are cosmopolitan in distribution and frequently the most abundant insects found in freshwater ecosystems. The capacity of the family to tolerate large gradients of pH, salinity, depth, oxygen concentration, temperature and productivity enables members of the Chironomidae to occupy virtually every available niche present in freshwater environments.In addition to wide distribution and abundance, Chironomidae are well suited for paleolimnological studies because the larvae possess chitinous head capsules which are well-preserved in lake sediment and relatively easily recovered and identified. As a result, chironomids are increasingly being used to track a number of natural and anthropogenically induced limnological changes resulting from atmospheric contamination, eutrophication and increased lake water salinity. Other areas in which subfossil chironomid analysis has provided valuable insight include climate change, phylogentics and biogeography and aquatic ecosystem dynamics and development.Details describing the biology and ecology of the Chironomidae that are directly relevant to their use in paleoenvironmental and biogeographical studies are presented. The methodology describing the recovery and identification of subfossil chironomid remains is reviewed. A generalized overview of the statistical methods that are commonly employed in relating the modern distribution of chironomids to specific aspects of the environment, i.e., the calibration dataset approach, is briefly discussed. Case studies that highlight the various uses and applications of chironomid analysis in areas of paleoenvironmental and biogeographical research relevant to geographers are described. Lastly, the current status of chironomid research in academic geography is discussed and suggestions of potential future research directions are made.

show abstract

Trophic Status of Southeastern Lake Michigan Based on the Chironomidae (Diptera)

Cited by 18 publications

References 6 publications

Limnological and ecological sensitivity of Rwenzori mountain lakes to climate warming

Limnological and ecological sensitivity of Rwenzori mountain lakes to climate warming

Status and Trends of Benthic Populations in a Coastal Drowned River Mouth Lake of Lake Michigan

The use and application of freshwater midges (Chironomidae: Insecta: Diptera) in geographical research

Contact Info

Product

Resources

About