Patterns and Processes of Speciation in Ancient Lakes

Wilke, Thomas; Väinölä, Risto; Riedel, Frank

doi:10.1007/978-1-4020-9582-5

Cited by 5 publications

(5 citation statements)

References 335 publications

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“…Eastman & McCune 2000; Sullivan et al 2002; Kocher 2004; Wilson et al. 2004; Wesselingh 2007; Grant & Grant 2008; Wilke et al 2008; Köhler et al 2010).…”

Section: Introductionmentioning

confidence: 99%

On the Miocene Cyprideis species flock (Ostracoda; Crustacea) of Western Amazonia (Solimões Formation): Refining taxonomy on species level

Groß

Ramos

Piller

2014

Zootaxa

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The Miocene mega-wetland of western Amazonia holds a diverse, largely endemic ostracod fauna. Among them, especially the genus Cyprideis experienced a remarkable radiation. Micropalaeontologic investigations of a 400 m long sediment core (~62 km SW Benjamin Constant, Amazonia, Brazil) permitted a taxonomic revision of about two-thirds of hitherto described Cyprideis species. We evaluate the diagnostic value of shell characters and provide an extensive illustration of the intraspecific variability of species. Based on comparative morphology, the 20 recorded Cyprideis species are arranged in groups and subgroups. The “smooth” group comprises C. amazonica, C. kotzianae, C. kroemmelbeini, C. machadoi, C. multiradiata, C. olivencai, C. paralela and C. simplex; the “ornate” group C. curucae nom. nov., C. cyrtoma, C. aff. graciosa, C. inversa, C. ituiae n. sp., C. matorae n. sp., C. minipunctata, C. munoztorresi nom. nov., C. pebasae, C. reticulopunctata, C. schedogymnos and C. sulcosigmoidalis. Five species have been revalidated, two renamed, two synonymised and two are new descriptions. Along with 10 further formally established species, for which a review is pending, Cyprideis keeps at least 30 endemic species in that region during Miocene times. Up to 12 Cyprideis species have been found to occur sympatrically, representing >90 % of the entire ostracod fauna. Ostracod index species enable a biostratigraphic allocation of the well succession to the Cyprideis minipunctata to Cyprideis cyrtoma biozones, corresponding to a late Middle to early Late Miocene age (late Serravallian–early Tortonian).

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“…Eastman & McCune 2000; Sullivan et al 2002; Kocher 2004; Wilson et al. 2004; Wesselingh 2007; Grant & Grant 2008; Wilke et al 2008; Köhler et al 2010).…”

Section: Introductionmentioning

confidence: 99%

On the Miocene Cyprideis species flock (Ostracoda; Crustacea) of Western Amazonia (Solimões Formation): Refining taxonomy on species level

Groß

Ramos

Piller

2014

Zootaxa

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“…Consequently, collating detailed maps used to require large investments of precious field time (e.g., (Heg et al, 2005), (Matsumoto & Kohda, 2007), (Sturmbauer, Fuchs, et al, 2008), (Tanaka et al, 2015), (Josi et al, 2020)). The work described here took a total of three dives per plot, one each for setting up the grid, conducting the survey and filming, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Note that the assignment of a given species to one of these categories was partly based on the geographical and temporal scales at which we collected data, that is a resolution of 1 m 2 and a single round of surveying. Several of the species that we consider 'transient' at this geographical scale are indeed 'territorial' at larger scales (e.g., Neolamprologus modestus (Hellmann et al, 2015); Neolamprologus tetracanthus (Matsumoto & Kohda, 2007); Tropheus moorii (Sturmbauer, Fuchs, et al, 2008); Xenotilapia flavipinnis (Yanagisawa, 1986)), while others establish temporary territories linked to the presence of 'shell nests' (e.g. Lamprologus callipterus (Schütz et al, 2016); Telmatochromis vittatus (Ota et al, 2012); no such 'shell nests' were present in our study plots).…”

Section: Fieldwork-survey and Filmingmentioning

confidence: 98%

“…In several species, snail shells fulfil the same role as rocks with regard to reproduction and protection (Sefc, 2011). Rocks and shells thus represent a crucial abiotic resource that impacts the distribution of species and the composition of fish communities at both lake-wide and local scales (Sturmbauer, Fuchs, et al, 2008), (Takeuchi et al, 2010), (Koblmüller et al, 2011). Within a given habitat, intra-and inter-specific competition for access to these resources is then a key factor in a fish's biotic environment for many species, often resulting in pronounced territoriality (Kohda, 1991), (Matsumoto & Kohda, 2004), (Desjardins et al, 2008), (Sturmbauer, Hahn, et al, 2008), (Winkelmann et al, 2014).…”

Section: Fieldwork-survey and Filmingmentioning

confidence: 99%

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On the importance of defendable resources for social evolution: Applying new techniques to a long‐standing question

2021

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“…In this study, we show that near-shore L. tanganjicae jellyfish blooms can alter the activity levels and behaviours of cichlid fishes caught within their areas of effect. Many of the fishes that live and breed in these shallow rocky habitats are spatially restricted to the few square metres of substrata comprising their territories (territories of most species span less than 5 m 2 [29], but sometimes reach up to 10 m in diameter [30]), and many of these fish remain on their territories as jellyfish blooms arrive. We recorded the density of one bloom to be approximately 2500 medusae m −3 , similar to a bloom documented by Salonen et al [18] that reached approximately 3000 medusae m −3 .…”

Section: Discussionmentioning

confidence: 99%

Freshwater hydrozoan blooms alter activity and behaviour of territorial cichlids in Lake Tanganyika

2019

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Blooms of gelatinous zooplankton can represent dramatic environmental perturbations for aquatic ecosystems. Yet, we still know little about how blooms impact fitness-related behaviours of fish caught within their areas of effect, especially for freshwater systems. Here, we documented the behavioural impacts of freshwater hydrozoan (Limnocnida tanganjicae) blooms on a territorial cichlid (Variabilichromis moorii), as well as on the wider community of cichlids in a shallow-water rocky habitat of Lake Tanganyika. Compared with non-bloom conditions, V. moorii individuals in the midst of blooms reduced their swimming and territory defence activities (each by approx. 50%) but not their foraging or affiliative behaviours. Despite this reduction in activity, V. moorii could not entirely avoid being stung and preferred to remain closer to the rocky substrata as opposed to the more open demersal zone. Many other fishes similarly hid among the benthic substrata, changing the composition of the fish community in the demersal zone during bloom conditions. Reductions in activity could have multiple fitness-related implications for individual fish. Establishing the consequences of these behavioural changes is important for understanding the effects of gelatinous zooplankton blooms in freshwater systems.

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Patterns and Processes of Speciation in Ancient Lakes

Cited by 5 publications

References 335 publications

On the Miocene Cyprideis species flock (Ostracoda; Crustacea) of Western Amazonia (Solimões Formation): Refining taxonomy on species level

On the Miocene Cyprideis species flock (Ostracoda; Crustacea) of Western Amazonia (Solimões Formation): Refining taxonomy on species level

On the importance of defendable resources for social evolution: Applying new techniques to a long‐standing question

Freshwater hydrozoan blooms alter activity and behaviour of territorial cichlids in Lake Tanganyika

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