Diel horizontal distribution of microcrustaceans and predators throughout a year in a shallow neotropical lake

Ms, Arcifa; Tc, Bunioto; Perticarrari, André; Wj, Minto

doi:10.1590/s1519-69842013000100012

Cited by 12 publications

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“…A new structuring of species dominance, with a preponderance of copepods and a medium-sized r-strategist cladoceran (C. richardi), which is competitively superior to a larger species (D. gessneri) (Ferreira, 2013), was apparent in the last two periods. The success or recovery of some populations after the key period may be related to the ability to occupy also the littoral zone of the lake, where Chaoborus and mites are less abundant, as observed for B. tubicen (Arcifa et al, 2013;Souza, 2015). We presume that these areas are not permanent habitats, but serve to maintain a minimum population density and enable the reoccupation of the limnetic zone when conditions are more favourable, as we are observing for B. tubicen.…”

Section: Discussionmentioning

confidence: 64%

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A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

et al. 2015

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INTRODUCTIONLong-term studies are essential for understanding ecological processes such as the influence of stressors and are basic for modeling, but are few in number because of their inherent difficulties, including costs (Jackson and Füreder, 2006;Maberly and Elliott, 2012). In particular, long-term studies of zooplankton can reveal the influence of past factors, including management decisions (Hambright, 2008). Some causes of changes in the zooplankton that are perceptible over a longer period include alterations of abiotic factors or predator invasion (Yan et al., 2008).The factors that affect the diversity and size of zooplankton species are intriguing issues, but still subject to controversy. From the classic paper by Brooks and Dodson (1965) to recent studies, several factors have been contemplated, and temperature has emerged as the preponderant factor for explaining latitudinal differences in zooplankton body size (Gillooly and Dodson, 2000). Gillooly and Dodson compared more than 1100 lakes located between 81°N and 77°S latitude, and found that the size variation of cladoceran species was related to latitude, with smaller sizes in the tropics and the Arctic and a greater difference between the tropics and the temperate zone. According to these authors, the highest mean sizes were observed between 6°C and 8°C, declining at higher or lower temperatures. Havens et al. (2015), comparing 122 lakes located from 6° to 74°N and from 19° to 21°S, showed a relationship between size (as weight) of cladocerans and cyclopoid copepods and temperature. In contrast, Iglesias et al. (2011) suggested that predation by fish is the major factor explaining the smaller size of zooplankton in warm lakes. Hart and Bychek (2011), in their extensive review of the many factors that could potentially influence zooplankton size, addressed extrinsic factors such as temperature, food and predation, amongst others, besides intrinsic ones. The authors concluded, however, that although a general pattern may occur, different results can arise from distinct ecosystems.J. Limnol., 2015; 74(3): 606-617 ORIGINAL ARTICLE DOI: 10.4081/jlimnol.2015DOI: 10.4081/jlimnol. .1132 A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

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Section: Discussionmentioning

confidence: 64%

“…The water mite Krendowskia sp. (max length ~1.1 mm) is also a limnetic dweller (Arcifa et al, 2013), but its densities are lower than those of Chaoborus larvae.…”

Section: Study Areamentioning

confidence: 99%

A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

et al. 2015

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“…However, as the gerrid moves over the water surface, inserting only its sucking apparatus in the water, only cladocerans that reach the surface film are preyed on. The other invertebrates in Lake Monte Alegre, such as chaoborid larvae, which are more abundant in the limnetic zone (Arcifa et al, 2013; In press) and the notonectid, which is able to dive into shallow waters, are probably more efficient predators than the gerrid Rheumatobates crassifemur.…”

Section: Final Remarksmentioning

confidence: 99%

Spatial and temporal distribution of gerrid (Heteroptera) and predation on microcrustaceans from a tropical shallow lake

Domingos

Arcifa

2016

Braz. J. Biol.

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Predator-prey interactions involving an aquatic insect and zooplanktonic prey of different sizes were investigated to quantify prey mortality exposed to predators. Laboratory experiments were undertaken with the young and adult gerrid Rheumatobates crassifemur to test predation and size selectivity on the cladocerans Daphnia gessneri, Ceriodaphnia richardi, and Bosmina tubicen. Population fluctuations and spatial distribution of the gerrid were also evaluated in a small and shallow Brazilian lake throughout 12 months in fortnightly samples. The insects were more abundant in the littoral (mean density 7.0 ± 1.2 ind.m -2 ) compared to the limnetic zone. The period with the highest densities was late January to June, in both zones. Predation by young instars on Daphnia and Ceriodaphnia was significant (mean ingestion rate of 1.3 ± 0.1 D. gessneri and 0.7 ± 0.1 C. richardi per predator per hour). Adult insect fed only the large-sized prey (mean ingestion rate of 1.0 ± 0.1 D. gessneri per predator per hour). Young gerrids have greater potential to prey on cladocerans than adults, and size selectivity occurred for both predators. Preference of adults by the larger prey is probably related to difficulties in manipulating smaller planktonic prey, such as Ceriodaphnia. Due to higher densities of insects in the littoral, higher predation on zooplankton in this zone is expected. This study does contribute to a better understanding of trophic interactions in tropical shallow lakes and is the first to investigate predation of a gerrid on cladocerans in laboratory experiments.Keywords: predation, gerrids, aquatic insects, zooplankton, neotropical lake.Distribuição espacial e temporal de gerrídeo (Heteroptera) e a predação sobre microcrustáceos de um lago tropical raso ResumoForam investigadas as interações predador-presa, envolvendo inseto aquático e presas zooplanctônicas de diferentes tamanhos para quantificar a mortalidade das presas expostas a predadores. Experimentos de laboratório foram realizados com jovens e adultos do gerrídeo Rheumatobates crassifemur para testar a predação e a seletividade por tamanho das espécies de cladóceros Daphnia gessneri, Ceriodaphnia richardi e Bosmina tubicen. Flutuações populacionais e a distribuição espacial do gerrídeo também foram avaliadas em um lago brasileiro pequeno e raso durante 12 meses em amostras quinzenais. Os insetos foram mais abundantes no litoral (densidade média 7,0 ± 1,2 ind.m -2 ) em comparação com a zona limnética. Maiores densidades ocorreram de fim de janeiro a junho, em ambas as zonas. A predação dos jovens foi significativa sobre Daphnia e Ceriodaphnia (taxa de ingestão média 1,3 ± 0,1 D. gessneri and 0,7 ± 0,1 C. richardi por predador por hora). Adultos predaram somente a presa maior (taxa de ingestão média 1,0 ± 0,1 D. gessneri por predador por hora). Gerrídeos jovens têm um maior potencial para predar cladóceros que os adultos, e seletividade por tamanho ocorreu para ambos. A preferência dos adultos somente pela presa maior provavelmente está relacionad...

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“…Além das condições climáticas e alimento, a predação seria outro fator que influencia as densidades de C. richardi na estação quente, como comprovado em experimento de laboratório . Como a espécie é utilizada como item alimentar por larvas de caoborídeos, ela seria mais afetada na zona onde esses predadores são mais abundantes.A preferência de B. tubicen pelo litoral foi observada anteriormente (Arcifa et al, 2013), mas antes do aparecimento do ácaro ela ocupava mais efetivamente a zona limnética 39 (Arcifa et al, 1992). Esta espécie é muito susceptível à predação por caoborídeos, uma vez que é presa preferencial desse predador Castilho-Noll & Arcifa, 2007a) e possivelmente de ácaros (Cassano et al, 2002).…”

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“…Porém, a ictiofauna concentra-se principalmente no litoral, próxima ou nos bancos de macrófitas (Arcifa & Meschiatti, 1993;, o que pode aumentar a influência sobre os cladóceros na zona litorânea. Essa também seria uma das hipóteses para explicar a queda nas densidades das espécies na zona litorânea, além da quantidade e qualidade do alimento, considerando ainda que cladóceros não realizam migração horizontal (DHM) no lago para escapar da predação (Arcifa et al, 2013). Além da predação potencial por peixes, há predação por invertebrados, como hemípteros (Domingos, 2014).…”

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Variação espacial e temporal de microcrustáceos planctônicos do lago Monte Alegre e experimentos abordando a influência da qualidade do alimento sobre o desempenho dos cladóceros

Souza¹

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analisar a influência da quantidade e qualidade do alimento sobre os parâmetros de tabela de vida de duas espécies de cladóceros encontradas no lago, utilizando o séston de cada zona. Fatores físicos e químicos do séston também foram avaliados no período dos experimentos. D. birgei mostrou preferência pela zona litorânea e D. ambigua pela zona limnética, enquanto C. richardi e D. gessneri não apresentaram preferência significativa.A qualidade do alimento não influenciou de maneira negativa o desenvolvimento de C. richardi e D. birgei, no período dos experimentos, podendo não ser o fator responsável por sua distribuição no lago. Já D. birgei apresentou diferenças significativas entre as zonas, quanto ao total de neonatos por fêmea, fecundidade média e máximo de neonatos por prole. Dessa maneira, a zona litorânea do lago Monte Alegre mostrou-se propícia ao desenvolvimento de cladóceros planctônicos; a qualidade do séston nesta zona não influencia de maneira negativa os parâmetros de tabela de vida de C. richardi e D. birgei. Palavras-chave: Zooplâncton, Tabela de vida, Séston, Variação espacial, Cladóceros ABSTRACTThis work is divided into two chapters. The first deals with the spatial distribution of planktonic microcrustaceans in the littoral and limnetic zones of the Lake Monte Alegre, located in Ribeirão Preto, São Paulo, and the influence of abiotic and biotic factors on the development and distribution. This chapter uses data from , concerning the limnetic zone and is a manuscript to be submitted for publication; the data analyzed in this study were those related to the littoral zone, as well as all the statistical analysis for comparison between the two zones. Weekly samples of zooplankton and their invertebrate predators, obtained in the same period in both zones were analyzed for one year, with the aim of studying the fluctuation throughout the year, its reproduction and which species of planktonic microcrustaceans occupy the littoral; physical and chemical factors were evaluated in the same period of the plankton samples to determine the conditions for the organisms in the two zones. The most abundant planktonic microcrustaceans distributed in both zones, Bosmina tubicen and Diaphanosoma birgei showing preference for the littoral, while Daphnia gessneri was more abundant in the limnetic zone and Ceriodaphnia richardi and Daphnia ambigua were indifferent, regarding both zones. Copepods occupied preferentially the pelagic zone. Higher concentration of algal carbon was recorded in the limnetic zone in relation to the littoral zone, but some algae may have indigestible features. Our data indicate that the shoreline of the lake has favorable conditions for the development of planktonic cladocerans, and the preference of some species for this area could be a strategy to reduce predation by limnetic invertebrates. Although the littoral has other predators, mortality in the limnetic zone might be higher. Chapter two presents the horizontal distribution of planktonic microcrustaceans, especially cladocerans, in t...

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Diel horizontal distribution of microcrustaceans and predators throughout a year in a shallow neotropical lake

Cited by 12 publications

References 35 publications

A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

Spatial and temporal distribution of gerrid (Heteroptera) and predation on microcrustaceans from a tropical shallow lake

Variação espacial e temporal de microcrustáceos planctônicos do lago Monte Alegre e experimentos abordando a influência da qualidade do alimento sobre o desempenho dos cladóceros

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