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Chironomids

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There is an abundant but unconnected literature on the association between chironomids’ distribution and aquatic environmental conditions (e.g., oxygen levels, water temperature, etc.). Chironomids-based paleoecological studies can be especially useful for estimating the environmental conditions that existed before human records were kept. This literature review offers a discussion and synthesis of the literature examining chironomids’ distribution. An understanding of this literature is important and timely. With global warming occurring and the climate changing, it is important to be able to predict the changes that will occur and the effect that they will have. To forecast the change in temperature that will occur it is useful to understand …show more content…

All these dimensions of chironomids’ habitat affected their population at the different lakes each study tended to look at. As well as different amounts of chironomids being found in each lake, different species would be found as well (Brooks & Birks, 2000). By understanding which chironomids were in which lakes, scientists can then understand the environmental factors at the time that permitted the species to live abundantly or sparsely. The research sites all tended to be in high latitudes. High latitudes were chosen as the temperature is cold enough to affect the range in which the different species of chironomids could live. Most of the research on the distribution of chironomids has taken place in the northern United States and northern Europe (Olander et al., 1997; Lotter el al, 1999; Brooks & Birks, 2000; Porinchu & Cwynar, 2000; Larocque et al., 2001), with only a small minority of studies being conducted in Canada (Gajweski et al., 2005; Walker, 1990; Wilson & Gajweski, …show more content…

In general the species of chironomids tended to be broken up into relative warm lakes, temperate lakes that do not extend beyond the arctic tree line, diluted lakes, and high saline lakes. Each study showed slightly different species being found in each category due to the surrounding features of the lake. Overall the same species were being found in each range as the climate was relatively similar. Some of the research conducted an intercontinental comparison between the distribution of chironomids in North America and Europe (Lotter el al, 1999). The results were not as constant as a singular study as the species found in different climates varied more than in one

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