Speciation in Ancient Lakes

Brooks, John L.

doi:10.1086/397375

Cited by 274 publications

(136 citation statements)

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“…salinity increased. As other ancient lakes (Brooks 1950), the Caspian has been a focus of speciation. Adaptive radiation has occurred in many groups, and endemism at the species level often reaches 80%.…”

Section: The Biotamentioning

confidence: 99%

The Caspian Lake: History, biota, structure, and function

Dumont

1998

Limnology & Oceanography

245

179

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The elongate, endorheic Caspian Lake has a north-south orientation and its main freshwater inflow, the Volga River, enters at the shallow north end. Two deep basins occupy its central and southern regions. These facts lead to horizontal differences in temperature, salinity, and ecology. Nutrient levels and primary production are low. Historically, lake level has fluctuated by -6 m, but on the geological timescale, fluctuations of >200 m have occurred. The lake formed in the late Miocene, first went through a long shrinking phase, expanded to three times its present size in the late Pliocene, and repeatedly rose and fell throughout the Pleistocene, with corresponding freshenings and salinizations. The lake surface has remained below sea level since the last pleniglacial. This dynamic history led to the assemblage of a set of euryhaline biota of Tethyan and freshwater origin, besides Baltic elements, that invaded with glacial meltwater. Endemism is as high as in Lake Baikal, but typical marine groups are absent. Because the lake is oxygenated to the bottom, its biota show a vertical zonation, but without a true abyssal community, suggesting cat&&ophic episodes of deep anoxia.

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Section: The Biotamentioning

confidence: 99%

The Caspian Lake: History, biota, structure, and function

Dumont

1998

Limnology & Oceanography

245

179

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“…In terms of biodiversity at species level, ancient lakes are considered as diversity ''hot-spots'' (Rossiter & Kawanabe, 2000). Their prolonged isolation from other ecosystems resulted in extraordinary biodiversity and high numbers of endemic lineages (Brooks, 1950;Martens, 1997;Cristescu et al, 2010). Revealing the geographical and environmental factors that influence the evolutionary and assembly processes that regulate this unique diversity is of a recent fundamental research interest.…”

Section: Introductionmentioning

confidence: 99%

Spatial patterns of diatom diversity and community structure in ancient Lake Ohrid

et al. 2018

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The extraordinary diversity in long-lived lakes is largely driven by distinct eco-evolutionary processes. With their unique biota and numerous endemic taxa, these lakes are key settings for fundamental studies related to ecology, diversity, and evolution. Here, we test how the environment shapes diatom diversity and community patterns over space in ancient Lake Ohrid. By applying Bray-Curtis similarity analyses of diatom community data, including widespread and endemic taxa, we identified two major zones: littoral and sublittoral. The latter one is being characterized with higher endemic diversity. The a and b diatom diversity and community distribution in the northern and eastern part of the lake are influenced by the presence of vertical (bathymetrical) and horizontal barriers. The zonation of the diatom communities appears driven by two large-scale factors: (i) water depth, and (ii) water chemistry, primarily, the concentration of total phosphorus, nitrogen ammonia, and conductivity. Both drivers appear to equally influence diatom diversity and community patterns. We present initial data on diatom-environment relations, where the results support earlier ecological studies emphasizing the relevance of ongoing human-induced eutrophication in the northern lake area. This study provides background information on the role of the environment in structuring contemporary diatom diversity. However, future research needs to focus on the biotic component including species competition in order to reveal the mechanisms driving spatial community dynamics in Lake Ohrid.

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“…Malawi Brooks, 1950;Fryer, 1959 and the immense methane reservoir and depauperate fauna in Kivu Degens et al,, 1973;Deuser et al,, 1973;Verbeke, 1957.…”

Section: Introductionmentioning

confidence: 99%

Late Pleistocene-Holocene chemical stratigraphy and paleolimnology of the Rift Valley lakes of central Africa

Hecky¹,

Degens²

1973

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Speciation in Ancient Lakes

Cited by 274 publications

References 0 publications

The Caspian Lake: History, biota, structure, and function

The Caspian Lake: History, biota, structure, and function

Spatial patterns of diatom diversity and community structure in ancient Lake Ohrid

Late Pleistocene-Holocene chemical stratigraphy and paleolimnology of the Rift Valley lakes of central Africa

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