Floating vegetation mats on a floodplain billabong in the Northern Territory of Australia

Hill, Richard W.; Webb, Grahame J. W.; Smith, Anthony M. A.

doi:10.1007/bf00006663

Cited by 10 publications

(5 citation statements)

References 14 publications

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“…2,3,8,9), an additional constraint is needed to find a unique solution. Following previous studies of exchange flow, we set an additional constraint that the system adjusts to maximize the conversion to kinetic energy, or equivalently to maximize the exchange flow rate q, a condition that has been verified by Jirka [9] and by Adams and Cosler [1].…”

Section: Model Developmentmentioning

confidence: 99%

Exchange flow between open water and floating vegetation

Zhang

Nepf

2011

Environ Fluid Mech

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Section: Model Developmentmentioning

confidence: 99%

Exchange flow between open water and floating vegetation

Zhang

Nepf

2011

Environ Fluid Mech

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“…After accumulation of some organic matter within the pleustophyte carpets, very fast-growing rhizomatous sedges or grasses like Cyperus papyrus, Scirpus cubensis, or Leersia hexandra interlacing each other allow colonization of these carpets. Owing to the uninterrupted rapid growth in tropical regions, these colonizers can successively replace the pleustophytes during a short time (Trivedy et al 1978;Gore 1983;Hill et al 1987;Ellery et al 1990;Wolf 1990;Junk 1997;Adams et al 2002;Azza et al 2006). Regarding the formation of floating marshes on dead organic matter washed ashore, we did not find any evidence of this in Lake Schollene but we cannot exclude this process, as it is generally possible.…”

Section: The Process Of Floating Mat Formation In Lake Schollenementioning

confidence: 63%

Formation and Development of Floating Peat Mats in a European Eutrophic Lake: A Case Study

Günther

2020

WSP

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In a case study, we analyzed the development of a spatially extended eutrophic floating marsh in a mid-European river floodplain lake. Such buoyant fringe marshes occur occasionally in lakes or river floodplain waters which have accumulated considerable amounts of very soft organic sediments. There are two hypotheses about their formation: 1) diverse helophytes, among them Cicuta virosa and Carex pseudocyperus, colonize floating-leaf plant communities or floating plant residues washed ashore, and 2) normal reed stands detach from the soft lake bottom which then float up caused by their rhizome aerenchyma and by marsh gas accumulation. The following questions were pursued: 1) How did these floating peat mats develop and do they grow horizontally on the water surface? and 2) How will they develop in future? Our study is mainly based on the analysis of historical maps, aerial photographs, and the zonation of the riparian vegetation. In the first half of the 20th century, the formation of floating swamps began on the waterside edge of large reeds that had developed on huge mud banks. The succession proceeded at this edge to alder carr without substantial expansion toward the open water. This and other findings led us to the conclusion that the floating mat formation proceeds according to the second hypothesis. Since there is no significant horizontal growth of these floating marshes, the riparian vegetation belt of the lake will only spread by repeating the entire process.

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“…as a competitive advantage over C. quadricarinatus ) (Acosta & Perry, 2001; Adams et al, 2021). Building resilience in crayfish populations including specific refuge areas through habitat protection, exclusion of herbivores and restoration (Bubb et al, 2008; Hill et al, 1987; Kozák et al, 2011) will be a key to buffering the impacts of climate change that may, for example, reduce areas of suitable habitat seasonally or permanently (e.g. marine transgression with sea‐level rise: Mulrennan & Woodroffe, 1998) and lead to greater variability in the frequency and severity of dry periods and floods (Karim et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Rediscovery, systematics and conservation of an enigmatic freshwater crayfish (Parastacidae) from the Australian monsoon tropics

Hammer,

Whiterod,

Grandjean

et al. 2024

Aquatic Conservation

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Freshwater wetlands are among the world's most valuable ecosystems, supporting diverse biota and critical ecological services, yet these habitats have suffered extensive and pervasive anthropogenic disturbance. Northern Australia represents a rare example of a relatively unmodified, vast wetland habitat. The freshwater crayfishes of the region are poorly documented, with one enigmatic species, the nutcracker yabby Cherax nucifraga, described from a single individual sampled opportunistically from the stomach of a predatory fish. Here we report on the rediscovery of C. nucifraga from a relatively limited distribution in semi‐permanent coastal freshwater wetlands. Field studies were conducted to inform natural resource management and conservation. Genome skimming to recover mitogenomes, 18S–28S and histone sequences demonstrated a sister relationship with two congeners from the tropics, and moderate molecular genetic substructure was apparent within C. nucifraga between mainland and Melville Island locations. Cherax nucifraga is characterised by the presence of a strawberry‐coloured soft patch on the outer margin of the claw, uniquely present in both mature males and females. Meristic and multivariate morphometric comparisons are made with the co‐occurring redclaw Cherax quadricarinatus and the allopatric whiteclaw yabby Cherax bicarinatus, with a summary of diagnostic traits developed into a visual guide and key. Programs to further understand ecology, threats and traditional ecological knowledge will help to inform the future conservation management of the species in the face of increasing development and environmental change to northern Australian coastal freshwater wetlands. Specific conservation actions include identifying and protecting refuge habitats and preventing incursions by other Cherax species.

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Floating vegetation mats on a floodplain billabong in the Northern Territory of Australia

Cited by 10 publications

References 14 publications

Exchange flow between open water and floating vegetation

Exchange flow between open water and floating vegetation

Formation and Development of Floating Peat Mats in a European Eutrophic Lake: A Case Study

Rediscovery, systematics and conservation of an enigmatic freshwater crayfish (Parastacidae) from the Australian monsoon tropics

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