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The role of waterbirds in the dispersal of freshwater cladocera and bryozoa in southern Africa

The role of waterbirds in the dispersal of freshwater cladocera and bryozoa in southern Africa It has long been presumed that waterbirds disperse the propagules of aquatic organisms. However, it is only in recent years that this claim has been empirically explored and little is still known about waterbird-mediated dispersal in southern Africa. Aquatic invertebrates are thought to be well adapted to dispersal by waterbirds because of their ability to produce hardy resting eggs. We explored the capacity of waterbirds to disperse the eggs of both cladocera and bryozoans via endo- and ectozoochory. We examined 283 faecal samples and 394 feather brushings from six waterbird species and two wetland sites in South Africa for the presence of diapausing eggs. A total of 108 intact diaspores were recovered, with intact eggs present in 16% and 7% of the faecal samples and feather brushings, respectively. Our results indicate that southern African waterbirds do take up the resting eggs of aquatic invertebrates and that these eggs can survive intact through the gut or remain attached to the feathers. These results provide evidence that waterbirds may be important vectors for aquatic invertebrates in southern Africa and imply that waterbirds may play a vital role in maintaining connectivity between invertebrate populations in isolated wetland patches. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png African Zoology Taylor & Francis

The role of waterbirds in the dispersal of freshwater cladocera and bryozoa in southern Africa

Reynolds, Chevonne; Cumming, Graeme S
African Zoology , Volume 50 (4): 5 – Oct 2, 2015
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The role of waterbirds in the dispersal of freshwater cladocera and bryozoa in southern Africa

Abstract

It has long been presumed that waterbirds disperse the propagules of aquatic organisms. However, it is only in recent years that this claim has been empirically explored and little is still known about waterbird-mediated dispersal in southern Africa. Aquatic invertebrates are thought to be well adapted to dispersal by waterbirds because of their ability to produce hardy resting eggs. We explored the capacity of waterbirds to disperse the eggs of both cladocera and bryozoans via endo- and...
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Publisher
Taylor & Francis
Copyright
© 2015 Zoological Society of Southern Africa
ISSN
2224-073X
eISSN
1562-7020
DOI
10.1080/15627020.2015.1108164
Publisher site
See Article on Publisher Site

Abstract

It has long been presumed that waterbirds disperse the propagules of aquatic organisms. However, it is only in recent years that this claim has been empirically explored and little is still known about waterbird-mediated dispersal in southern Africa. Aquatic invertebrates are thought to be well adapted to dispersal by waterbirds because of their ability to produce hardy resting eggs. We explored the capacity of waterbirds to disperse the eggs of both cladocera and bryozoans via endo- and ectozoochory. We examined 283 faecal samples and 394 feather brushings from six waterbird species and two wetland sites in South Africa for the presence of diapausing eggs. A total of 108 intact diaspores were recovered, with intact eggs present in 16% and 7% of the faecal samples and feather brushings, respectively. Our results indicate that southern African waterbirds do take up the resting eggs of aquatic invertebrates and that these eggs can survive intact through the gut or remain attached to the feathers. These results provide evidence that waterbirds may be important vectors for aquatic invertebrates in southern Africa and imply that waterbirds may play a vital role in maintaining connectivity between invertebrate populations in isolated wetland patches.

Journal

African Zoology – Taylor & Francis

Published: Oct 2, 2015

Keywords: connectivity; Daphnia; ectozoochory; endozoochory; ephippia; statoblast; waterbird-mediated dispersal; waterfowl

References

  • Dispersal in freshwater invertebrates
  • Field evidence of dispersal of branchiopods, ostracods and bryozoans by teal (Anas crecca) in the Camargue (southern France
  • Plant dispersal by teal (Anas crecca) in the Camargue: duck guts are more important than their feet
  • Endozoochory by ducks: influence of developmental stage of Bythotrephes diapause eggs on dispersal probability
  • Field evidence for the potential of waterbirds as dispersers of aquatic organisms
  • Digestive plasticity in Mallard ducks modulates dispersal probabilities of aquatic plants and crustaceans
  • Endozoochory largely outweighs epizoochory in migrating passerines
  • Connectivity, fragmentation, and extinction risk in dendritic metapopulations
  • How frequent is external transport of seeds and invertebrate eggs by waterbirds? A study in Doñana, SW Spain
  • Dispersal of aquatic organisms by waterbirds: a review of past research and priorities for future studies
  • Invertebrate eggs can fly: evidence of waterfowl-mediated gene flow in aquatic inverte- brates
  • High dispersal capacity of a broad spectrum of aquatic invertebrates via waterbirds
  • Ecosystem services provided by waterbirds
  • Recent advances in the study of long-distance dispersal of aquatic invertebrates via birds
  • Implications of waterbird ecology for the dispersal of aquatic organisms
  • The potential role of waterbirds in dispersing invertebrates and plants in arid Australia
  • An illustrated guide to the identification of cladoceran subfossils from lake sediments in northeastern North America: part 1—the Daphniidae, Leptodoridae, Bosminidae, Polyphemidae, Holopedidae, Sididae, and Macrothricidae
  • Invasion of an asexual American water flea clone throughout Africa and rapid displacement of a native sibling species
  • Effects of habitat fragmentation by damming on the persistence of stream-dwelling charr populations
  • Role of diapause in dispersal and invasion success by aquatic invertebrates
  • R: a language and environment for statistical computing version 3.1.2
  • The role of waterbirds in the dispersal of aquatic alien and invasive species
  • Comparing the potential for dispersal via waterbirds of a native and an invasive brine shrimp
  • Effect of passage through duck gut on germination of fennel pondweed seeds
  • Multiple risk reduction mechanisms: can dormancy substitute for dispersal?
  • How did this snail get here? Several dispersal vectors inferred for an aquatic invasive species
  • Vector activity and propagule size affect dispersal potential by vertebrates
  • Gut travellers: internal dispersal of aquatic organisms by waterfowl
  • Migratory strategies of waterbirds shape the continental-scale dispersal of aquatic organisms