Zoogeography of the Southeast Asian Rotifera

Segers, Hendrik

doi:10.1007/978-94-010-0756-6_32

Cited by 40 publications

(55 citation statements)

References 67 publications

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“…Consequently, given the similarities in temperature and the absence of any major biogeographical barrier between Khuzestan and Southeast Asia, at least for rotifers to disperse, and the high intrinsic dispersal ability of rotifers, it could have been expected that the rotifer fauna of Khuzestan would have more or less similar characteristics to those of the Oriental region. Considering the climatic nature of Khuzestan, the predominance of tropic-centered genera Lecane and Brachionus here may indicate the thermophilic nature of Lecane and Brachionus representatives in Khuzestan, as previously stated by Segers (2001Segers ( , 2003 for the Southeast Asian representative of those genera. The presence of both Colurella sanoamuangae, hitherto considered a Thai endemic (Segers, 2001), and Lecane bifastigata, a rare species of the Palearctic and Oriental regions (Segers, 1995(Segers, , 1996, in Khuzestan are remarkable.…”

Section: Discussionsupporting

confidence: 71%

“…Another area with a temperature more or less similar to that of the Tropic of Cancer is Southeast Asia. The main components of the rotifer fauna of Southeast Asia are thermophilic species (Segers, 2001). Consequently, given the similarities in temperature and the absence of any major biogeographical barrier between Khuzestan and Southeast Asia, at least for rotifers to disperse, and the high intrinsic dispersal ability of rotifers, it could have been expected that the rotifer fauna of Khuzestan would have more or less similar characteristics to those of the Oriental region.…”

Section: Discussionmentioning

confidence: 99%

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Rotifers of southwest Iran: a faunistic and biogeographical study

Reshteh¹,

Rahimian²

2014

Turk J Zool

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Until the present study, 156 rotifer species had been recorded from different parts of Iran. The present study was designed to fill in some of the gaps in our knowledge on rotifer fauna of Iran and to analyze the geographical data of rotifer records from this area. Given the location of the study on the corner of the Palearctic, we also wanted to understand the influence of neighboring zoogeographical regions on both Khuzestan and the rest of Iran, i.e. the Palearctic.Khuzestan Province, our study area, is situated in the subtropical zone of the southwest corner of Iran (Figure 1) where the province and its freshwater systems, which

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Section: Discussionsupporting

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Rotifers of southwest Iran: a faunistic and biogeographical study

Reshteh¹,

Rahimian²

2014

Turk J Zool

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“…This brachionid is examined from NEI from Mizoram (Sharma 1987, Sharma & Sharma 2014d, 2015c and is also observed from Madhya Pradesh in central India (Sharma & Naik 1996); the present report extended its distribution within NEI. Referring to the first category, Segers (2001) remarked on occurrence of reductus vicariant of B. dichotomus outside Australia, hinted at a possible Australian origin of this taxon and hypothesized its recent expansion to Southeast Asia. The disjunct populations of this brachionid known from India only from NEI (Meghalaya, Tripura and Assam) are hypothesized (Sharma & Sharma 2014a, 2014c, 2014d, 2015b, 2015c to their possible recent expansions to the Indian subregion.…”

Section: Discussionmentioning

confidence: 99%

Interesting rotifers (Rotifera: Eurotatoria) from floodplain lakes of lower Brahmaputra river basin of Assam, northeast India

Sharma¹,

Khan²

2016

Opusc Zool

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Abstract. The plankton and semi-plankton samples collected from four floodplain lakes (beels) of Barpeta district of lower Brahmaputra river basin, Assam state, northeastern India (NEI) revealed eighteen rotifer species of biodiversity and biogeographic interest belonging to five families and six genera. One species is new to the Indian Rotifera and one species is new to Assam. Our collections are characterized by two Australasian elements, five Oriental endemics, seven paleotropical species, and one cosmo (sub) tropical species. Nine species, restricted to date to NEI, are examples of regional distribution importance in India while six species depicted disjunct distribution in the country. Interestingly, seven species are categorized as Eastern hemisphere elements. All the taxa are illustrated to warrant validation as an increasing magnitude of 'unverifiable records' is a serious impediment for the progress of rotifer biodiversity in India.

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“…The lower sensitivity of the zooplankton community in the present study was probably the result of the limited number of cladoceran species and their relatively low abundances, whereas rotifers dominated the zooplankton communities. Tropical freshwater zooplankton communities, including those in Southeast Asia (Segers 2001), have indeed been reported to be largely dominated by rotifers (Kutikova 2002). Lower and higher diversity and abundance of, respectively, cladocerans and rotifers imply that the chance of encountering sensitive representatives is also higher and lower, respectively.…”

Section: Sensitivity Of the Zooplankton Communitymentioning

confidence: 99%

Direct and Indirect Effects of the Fungicide Carbendazim in Tropical Freshwater Microcosms

Daam

Satapornvanit

Brink

et al. 2009

Arch Environ Contam Toxicol

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Direct and indirect effects of the fungicide carbendazim on ecosystem structure and functioning were studied B8 weeks after application (nominal concentrations: 0, 3.3, 33, 100, and 1000 lg/L) to outdoor microcosms in Thailand. Direct effects on macroinvertebrates are discussed in detail in a separate article. The present article presents the effects on other end points and discusses the hypothesized ecologic effect chain. Negative treatment effects on the zooplankton community were only recorded for the highest carbendazim treatment (NOEC community = 100 lg/L). The rotifer Keratella tropica, cladocerans (Moina micrura, Ceriodaphnia cornuta, and Diaphanosoma sp.), and cyclopoid copepods were decreased or even eliminated at this treatment level. The decrease in zooplankton and macroinvertebrate abundances was accompanied by an increase in numbers of several tolerant invertebrates, presumably caused by a release from competition and predation. The death of sensitive invertebrates probably also led to an overall decreased grazing pressure because increased levels of chlorophyll-a and bloom of the floating macrophyte Wolffia sp. were noted. The increase in primary producers is discussed to be the probable cause of changes in physicochemical water conditions, eventually resulting in an anoxic water layer during the last 3 weeks of the experiment. This is likely to have resulted in decreased invertebrate abundances noted in that period. Furthermore, the decreased decomposition of Musa (banana) leaves observed 8 weeks after application is considered to be the indirect effect of a decreased microbial activity resulting from these anoxic water conditions, rather than a direct toxic effect of carbendazim.

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Zoogeography of the Southeast Asian Rotifera

Cited by 40 publications

References 67 publications

Rotifers of southwest Iran: a faunistic and biogeographical study

Rotifers of southwest Iran: a faunistic and biogeographical study

Interesting rotifers (Rotifera: Eurotatoria) from floodplain lakes of lower Brahmaputra river basin of Assam, northeast India

Direct and Indirect Effects of the Fungicide Carbendazim in Tropical Freshwater Microcosms

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