Four decades of change: dramatic loss of zoobenthos in an oligotrophic lake exhibiting gradual eutrophication

Caires, Andrea M.; Chandra, Sudeep; Hayford, Barbara; Wittmann, Marion E.

doi:10.1899/12-064.1

Cited by 25 publications

(29 citation statements)

References 61 publications

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“…For example, in Lake Victoria, decreased water clarity has impacted reproduction by endemic cichlids, leading to the disappearance of dozens of species (Seehausen et al ). In Lake Baikal, littoral algal blooms have recently been recognized as threatening the extraordinary diversity of the nearshore benthos (Timoshkin et al ) and in Lake Tahoe, gradual decreases in water clarity appear to have precipitated declines of endemic deep‐water macrophyte‐invertebrate associations (Caires et al ). In Lakes Valencia, Titicaca, and Victoria, pronounced eutrophication has caused harmful algal blooms and severe degradation of water quality for human use (Jaffé et al ; Verschuren et al ; ESA ).…”

Section: Eutrophication: Sources and Effectsmentioning

confidence: 99%

“…Fish parasites and diseases have also been unintentionally introduced into ancient lakes, presumably transported along with stocked non-native fish. In Lake Ohrid, a nematode parasite first recorded in the 1970s seems to be linked to the artificial stocking of eel young (Cakić et al 2002). In Lake Biwa, Uchii et al (2013) associated mass die-offs of carp with the introduction of a cyprinid herpes virus into the lake.…”

Section: Species Introductionsmentioning

confidence: 99%

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Recent ecological change in ancient lakes

Hampton

McGowan

Ozersky

et al. 2018

Limnology & Oceanography

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Ancient lakes are among the best archivists of past environmental change, having experienced more than one full glacial cycle, a wide range of climatic conditions, tectonic events, and long association with human settlements. These lakes not only record long histories of environmental variation and human activity in their sediments, but also harbor very high levels of biodiversity and endemism. Yet, ancient lakes are faced with a familiar suite of anthropogenic threats, which may degrade the unusual properties that make them especially valuable to science and society. In all ancient lakes for which data exist, significant warming of surface waters has occurred, with a broad range of consequences. Eutrophication threatens both native species assemblages and regional economies reliant on clean surface water, fisheries, and tourism. Where sewage contributes nutrients and heavy metals, one can anticipate the occurrence of less understood emerging contaminants, such as pharmaceuticals, personal care products, and microplastics that negatively affect lake biota and water quality. Human populations continue to increase in most of the ancient lakes’ watersheds, which will exacerbate these concerns. Further, human alterations of hydrology, including those produced through climate change, have altered lake levels. Co‐occurring with these impacts have been intentional and unintentional species introductions, altering biodiversity. Given that the distinctive character of each ancient lake is strongly linked to age, there may be few options to remediate losses of species or other ecosystem damage associated with modern ecological change, heightening the imperative for understanding these systems.

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Section: Eutrophication: Sources and Effectsmentioning

confidence: 99%

Section: Species Introductionsmentioning

confidence: 99%

Recent ecological change in ancient lakes

Hampton

McGowan

Ozersky

et al. 2018

Limnology & Oceanography

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“…n. are likely endemic to Lake Tahoe. A total of 10 endemic macrobenthos have previously been identified in Lake Tahoe (summarized by Caires et al 2013), so it is reasonable to hypothesize that several species of meiobenthos also evolved in this ecosystem. Expanded sampling in the western United States, and beyond, will be necessary to validate the endemism of these species.…”

Section: Discussionmentioning

confidence: 99%

“…Lake Tahoe is one of the largest lakes by volume (1.5 × 1011 m 3 ) in the United States, only being exceeded by the Great Lakes. While, some basic ecological investigations have occurred in Lake Tahoe (Flint and Goldman 1975, Frantz and Cordone 1996, Vander Zanden et al 2003), most recent investigations are focused on studies of water quality (Jassby et al 2003), invasive species (Denton et al 2012, Wittmann et al 2012), and loss of native biodiversity (Caires et al 2013). Meiobenthic (especially harpacticoid copepods) diversity has not been studied in Lake Tahoe until recently, and the ecological role of meiobenthos in Lake Tahoe remains unstudied.…”

Section: Introductionmentioning

confidence: 99%

First record of harpacticoid copepods from Lake Tahoe, United States: two new species of Attheyella (Harpacticoida, Canthocamptidae)

Bang¹,

Baguley²,

Moon³

2015

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Benthic harpacticoids were collected for the first time at Lake Tahoe, California-Nevada, United States. Two species were identified as members of the genus Attheyella Brady, 1880. The genus Attheyella comprises about 150 species within six subgenera, but only twelve species have previously been reported from North American freshwater habitats. The two new species of Attheyella described here have a 3-segmented endopod on P1 and 2-segmented P2–P4 endopods, the distal segment of exopod of P2–P4 has three outer spines, and the P5 has five setae on the exopod and six setae on the baseoendopod. Attheyella (Attheyella) tahoensis sp. n. most closely resembles Attheyella (Attheyella) idahoensis (Marsh, 1903) from Idaho, Montana, and Alaska (United States) and Attheyella (Attheyella) namkungi Kim, Soh & Lee, 2005 from Gosu Cave in South Korea. They differ mainly by the number of setae on the distal endopodal segment of P2–P4. In addition, intraspecific variation has been observed on the caudal rami. Attheyella (Neomrazekiella) tessiae sp. n. is characterized by the extension of P5 baseoendopod, 2-segmented endopod of female P2–P3, and naked third seta of male P5 exopod. The two new species are likely endemic to Lake Tahoe, an isolated alpine lake within the Great Basin watershed in the western United States.

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“…However, Lake Tahoe's benthic community is currently undergoing significant environmental 337 change (Caires et al, 2013), and eutrophication favors the success of colonists (Christie, Fraser 338 & Nepszy, 1972). Indeed, Lake Tahoe has recently experienced increased disturbance through 339 nearshore development, temperature warming the establishment of other NAS (e.g., Asian clam, 340 signal crayfish and various warmwater fishes) and losses in water transparency (Goldman, 1988; 341 …”

mentioning

confidence: 99%

Estimating relative risk of within-lake aquatic plant invasion using combined measures of recreational boater movement and habitat suitability

Wittmann

Kendall

Jerde

et al. 2014

Preprint

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Effective monitoring, prevention and impact mitigation of nonindigenous aquatic species (NAS) relies upon the ability to predict dispersal pathways and receiving habitats with the greatest risk of establishment. To examine mechanisms affecting species establishment within a large lake, we combined observations of recreational boater movements with empirical measurements of habitat suitability represented by nearshore wave energy to assess the relative risk (RR) of Eurasian watermilfoil (Myriophyllum spicatum) establishment. The model was evaluated using information from a 17 year (1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012) sequence of M. spicatum presence and absence monitoring. M. spicatum presence was not specifically correlated with recreational boater movements; however its establishment appears to be limited by wave action in Lake Tahoe. Of the sites in the "High" risk category (n=37), 54% had current or historical infestations, which included 8 of the 10 sites with the highest RR. Of the 11 sites in the "Medium" risk category, 5 had current or historical M. spicatum populations. Most (76%) of the sites in the "Low" risk category were observed in locations with higher wave action. Four sites that received zero boater visits from infested locations were occupied by M. spicatum. This suggests that the boater survey either represents incomplete coverage of boater movement, or other processes, such as the movement of propagules by surface currents or introductions from external sources are important to the establishment of this species. This study showed the combination of habitat specific and dispersal data in a relative risk framework can potentially reduce uncertainty in estimates of invasion risk.

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Four decades of change: dramatic loss of zoobenthos in an oligotrophic lake exhibiting gradual eutrophication

Cited by 25 publications

References 61 publications

Recent ecological change in ancient lakes

Recent ecological change in ancient lakes

First record of harpacticoid copepods from Lake Tahoe, United States: two new species of Attheyella (Harpacticoida, Canthocamptidae)

Estimating relative risk of within-lake aquatic plant invasion using combined measures of recreational boater movement and habitat suitability

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