Temporal and spatial patterns of insect emergence from a Lake Michigan coastal wetland

MacKenzie, Richard A.; Kaster, Jerry L.

doi:10.1672/0277-5212(2004)024[0688:taspoi]2.0.co;2

Cited by 34 publications

(18 citation statements)

References 26 publications

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“…These results suggest that at least some components of the wetland fauna vary seasonally, presumably reflecting their inherent life cycles. Such seasonal patterns in wetland invertebrates have been reported elsewhere in New Zealand, (Byars 1960;Barclay 1966), or in wetlands near Lake Michigan, USA (MacKenzie & Kaster 2004) where abundances of many taxa peaked in summer. Armitage et al (1995) also found peaks in invertebrate abundance in spring or autumn in Arctic wetlands.…”

Section: Discussionsupporting

confidence: 75%

Temporal variation of invertebrate communities in perennial wetlands

Suren

Lambert

2010

New Zealand Journal of Marine and Freshwater Research

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Temporal variability of wetland invertebrates was examined at two scales*inter-annual and seasonal*to determine whether it could confound results of spatially extensive wetland surveys. The inter-annual study collected samples from the Bullock Creek wetland (BCW) each summer for 4 years; the seasonal study collected samples quarterly for 14 months from two wetlands (Mahinapua and Shearer). Water pH, temperature and conductivity were also measured concurrently. Three site groupings were identified in BCW, reflecting differences in physicalÁ chemical parameters, which varied temporally but never converged. Few annual differences were found in invertebrate relative abundances in BCW, and ordination produced three sample groups, each of which contained distinct invertebrate communities. Water pH differed consistently between Mahinapua and Shearer. Relative abundances of nine taxa varied seasonally; however, ordination showed that both wetlands always supported discrete invertebrate communities. These results suggest that temporal fluctuations of invertebrates do not affect our ability to discriminate between wetlands.

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Section: Discussionsupporting

confidence: 75%

Temporal variation of invertebrate communities in perennial wetlands

Suren

Lambert

2010

New Zealand Journal of Marine and Freshwater Research

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“…Examining insect deposition rate as average inputs may underestimate the potential impact on terrestrial ecosystems in several ways. First, in temperate regions insect emergences from streams and lakes often occur as pulses during brief periods (MacKenzie and Kaster 2004) and can therefore represent significantly higher than average availability of resources. Second, the relative importance of those allochthonous resources may vary across taxa, with some consumers such as spiders along shorelines and riparian areas dependent on capturing flying prey such as emerging aquatic insects (Henschel 2004, Kato et al 2004).…”

Section: Insect Deposition Into Terrestrial Habitatsmentioning

confidence: 99%

Flux of aquatic insect productivity to land: comparison of lentic and lotic ecosystems

Gratton

Zanden

2009

Ecology

173

158

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Recently, food web studies have started exploring how resources from one habitat or ecosystem influence trophic interactions in a recipient ecosystem. Benthic production in lakes and streams can be exported to terrestrial habitats via emerging aquatic insects and can therefore link aquatic and terrestrial ecosystems. In this study, we develop a general conceptual model that highlights zoobenthic production, insect emergence, and ecosystem geometry (driven principally by area-to-edge ratio) as important factors modulating the flux of aquatic production across the ecosystem boundary. Emerging insect flux, defined as total insect production emerging per meter of shoreline (g C x m(-1) x yr(-1)) is then distributed inland using decay functions and is used to estimate insect deposition rate to terrestrial habitats (g C x m(-2) x yr(-1)). Using empirical data from the literature, we simulate insect fluxes across the water-land ecosystem boundary to estimate the distribution of fluxes and insect deposition inland for lakes and streams. In general, zoobenthos in streams are more productive than in lakes (6.67 vs. 1.46 g C x m(-2) x yr(-1)) but have lower insect emergence to aquatic production ratios (0.19 vs. 0.30). However, as stream width is on average smaller than lake radius, this results in flux (F) estimates 2 1/2 times greater for lakes than for streams. Ultimately, insect deposition onto land (within 100 m of shore) adjacent to average-sized lakes (10-ha lakes, 0.021 g C x m(-2) x yr(-1)) is greater than for average-sized streams (4 m width, 0.002 g C x m(-2) x yr(-1)) used in our comparisons. For the average lake (both in size and productivity), insect deposition rate approaches estimates of terrestrial secondary production in low-productivity ecosystems (e.g., deserts and tundra, approximately 0.07 g C x m(-2) x yr(-1)). However, larger lakes (1300 ha) and streams (16 m) can have average insect deposition rates (approximately 0.01-2.4 g C x m(-2) x yr(-1)) comparable to estimates of secondary production of more productive ecosystems such as grasslands. Because of the potentially large inputs of emerging aquatic insects into terrestrial habitats, ecosystem processes and terrestrial consumers can be influenced by insect inputs. The relative contribution of lakes and streams to this flux will vary among landscapes depending on the number and size of these ecosystems types on the landscape.

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“…In many ecosystems, interactions involving insects and other arthropods are the primary routes of energy flow, with insect biomass exceeding that of vertebrates (Power et al, 1992;MacKenzie and Kaster, 2004). Disruption of insect populations can resonate throughout an ecosystem and affect organisms at all levels.…”

Section: Introductionmentioning

confidence: 99%

Lethal and sublethal responses of an aquatic insect Culex quinquefasciatus (Diptera: Culicidae) challenged with individual and joint exposure to dissolved sodium selenate and methylmercury chloride

Jensen

Sorensen

Walton

et al. 2007

Environmental Toxicology

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Pollutants rarely occur alone in the natural environment, and few studies have focused on the potential interactions between metals or metalloids. In this study an aquatic insect, the southern house mosquito (Culex quinquefasciatus: Diptera), was used to test the individual and joint effects of dissolved sodium selenate (Se) and methyl mercury chloride (MeHg). We conducted ovipositional preference tests and 14-day chronic toxicity studies to determine lethal and sublethal responses of C. quinquefasciatus to a range of Se and MeHg concentrations and mixtures. No evidence was found for female ovipositional preference in field trials using artificial ponds. Larvae were more sensitive to MeHg than Se, with LC(50) values of 30 microg/L (CI = 28-31 microg/L) and 11 mg/L (CI = 10-12 mg/L) respectively. In addition, larval survival was significantly reduced at concentrations as low as 25 microg/L of MeHg and 8 mg/L of Se. A synergistic interaction was observed in the toxicity of the Se-MeHg mixtures to C. quinquefasciatus larvae. Larval mosquito survival was significantly reduced at 7.5 microg/L MeHg + 2.75 mg/L Se and an LC(50) value of 9 microg/L MeHg + 3.4 mg/L Se was determined for a fixed ratio mixture. The rate of growth of the larvae was analyzed using a Growth Index that provided a sensitive measure of the developmental effects of toxicant exposure. Sodium selenate at concentrations as low as 2 mg/L caused a significant decrease in growth between larvae in treatment versus control solutions after only 4 days. Similarly, MeHg at concentrations as low as 25 microg/L and a Se-MeHg mixture of 3 microg/L MeHg plus 1.1 mg/L Se caused significant growth reductions after only 2 and 3 days, respectively. These are the first reported survival and developmental data for an aquatic insect exposed to MeHg and Se-MeHg mixtures.

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Temporal and spatial patterns of insect emergence from a Lake Michigan coastal wetland

Cited by 34 publications

References 26 publications

Temporal variation of invertebrate communities in perennial wetlands

Temporal variation of invertebrate communities in perennial wetlands

Flux of aquatic insect productivity to land: comparison of lentic and lotic ecosystems

Lethal and sublethal responses of an aquatic insect Culex quinquefasciatus (Diptera: Culicidae) challenged with individual and joint exposure to dissolved sodium selenate and methylmercury chloride

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