Implications of waterbird ecology for the dispersal of aquatic organisms

Green, Andy J.; Figuerola, Jordi; Sánchez, Marta I.

doi:10.1016/s1146-609x(02)01149-9

Cited by 204 publications

(196 citation statements)

References 53 publications

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“…Also worth noting is the change in the physical structure of the lagoon verge, from the open P. australis beds to the dense stands of S. densiflora which could impede the use of the lagoon banks by some waterbird species. The reduction in available space for the saltmarsh bulrush Scirpus maritimus, whose seeds are an important food source for many waterfowl (Green et al 2002), could also have significant impact on the size of the duck population that this wetland can support.…”

Section: Discussionmentioning

confidence: 99%

The effect of water management on extensive aquaculture food webs in the reconstructed wetlands of the Doñana Natural Park, Southern Spain

et al. 2015

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Extensive aquaculture in coastal and estuarine wetlands can support both increased food production and wider ecosystem services when underpinned by effective management to promote productivity and hence food webs that support both commercial species and biodiversity. Changing hydrology, specifically water movement, within wetlands significantly impacts the physico-chemical properties of the water body and hence can be employed to manipulate productivity and alter patterns of recruitment of commercial species and may also transfer non-native species from the supplying water bodies. The reconstructed wetlands of Veta la Palma in the Doñana Natural Park are subjected to either a 1 % or 5 % d -1 water exchange with water drawn from the adjacent Guadalquivir estuary. This site provides an excellent opportunity for examining the effect of water management on the food webs that support both the birdlife and aquaculture activities for which this habitat is managed. Stable isotopes were used to examine food webs in three replicate lagoons under each water management scheme. In lagoons receiving higher water exchange, phytoplankton productivity appeared to be more important than benthic production in supporting food webs. Increased water exchange also changed the shape of the food webs, facilitated the colonisation of at least one non-native species and increased the importance of non-native species in the diets of large commercially harvested fish (> 60 % of seabass diet). Lagoons with high water flows also had between three and four times greater shrimp biomass than those of low flow lagoons. Non-native fauna were opportunistic omnivores, eating marginally more non-natives in lagoons with greater water exchange. Overall non-native cordgrass Spartina densiflora contributed only slightly more to food webs compared with the native reed Phragmites australis, despite the lagoon edge occupancy ratio of 9:1, respectively. Nonnatives also appear to enhance food provision for large predators and wetland birds, by increasing biomass, without competing for resources with native species, supporting the dual management objectives of aquaculture and waterbird conservation.

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Section: Discussionmentioning

confidence: 99%

The effect of water management on extensive aquaculture food webs in the reconstructed wetlands of the Doñana Natural Park, Southern Spain

et al. 2015

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“…Also, for charophytes, wind dispersal may play a role as spores are very light and generally easily dispersed by the wind. Propagules of aquatic macrophytes are also dispersed by waterfowl, fish and invertebrates (Green et al, 2002;Charalambidou & Santamaria, 2005;Brochet et al, 2010;Figuerola et al, 2010;Pollux, 2011). Especially the smaller-sized propagules are more likely to survive the gut passage in birds feeding on them and germinate afterwards (Soons et al, 2008).…”

Section: Dispersal Of Propagulesmentioning

confidence: 99%

“…Nevertheless, dispersal via animals provides macrophyte species with an opportunity to disperse over long distances, stretching up to 3000 km (Soons et al, 2008). Genetic analyses support the exchange of propagules among distant and upstream populations (Green et al, 2002;Pollux et al, 2009). Therefore, dispersal is a powerful mode for the submerged macrophytes to return to the restored water bodies.…”

Section: Dispersal Of Propagulesmentioning

confidence: 99%

Restoring macrophyte diversity in shallow temperate lakes: biotic versus abiotic constraints

et al. 2012

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Although many lake restoration projects have led to decreased nutrient loads and increased water transparency, the establishment or expansion of macrophytes does not immediately follow the improved abiotic conditions and it is often unclear whether vegetation with high macrophyte diversity will return. We provide an overview of the potential bottlenecks for restoration of submerged macrophyte vegetation with a high biodiversity and focus on the biotic factors, including the availability of propagules, herbivory, plant competition and the role of remnant populations. We found that the potential for restoration in many lakes is large when clear water conditions are met, even though the macrophyte community composition of the early 1900s, the start of humaninduced large-scale eutrophication in Northwestern Europe, could not be restored. However, emerging charophytes and species rich vegetation are often lost due to competition with eutrophic species. Disturbances such as herbivory can limit dominance by eutrophic species and improve macrophyte diversity. We conclude that it is imperative to study the role of propagule availability more closely as well as the biotic interactions including herbivory and plant competition. After abiotic conditions are met, these will further determine macrophyte diversity and define what exactly can be restored and what not.

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“…An often proposed natural mechanism for long-distance dispersal of aquatic invertebrates is hitch-hiking on the legs or plumage of, or via endozoochorous dispersal through, water birds (Charalambidou and Santamaría 2002;Green et al 2002;Frisch et al 2007;Rachalewski et al 2013). Experimental work by Rachalewski et al (2013) presented the possibility of Crangonyx amphipods hitchhiking on the legs or plumage of mallards; however, this was only for very restricted periods (less than 6 min) and a maximum flight distance of approximately 7 km.…”

Section: Introductions and Long-distance Dispersalsmentioning

confidence: 99%

Molecular evidence for mid-Pleistocene divergence of populations of three freshwater amphipod species (Talitroidea : Chiltoniidae) on Kangaroo Island, South Australia, with a new spring-associated genus and species

King

Leys

2014

Aust. J. Zool.

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Abstract. Recent molecular and morphological analyses have shown that chiltoniid amphipods, once thought to be a relictual group, are a diverse and speciose family of Australian freshwater amphipods. As part of a larger examination of the family, chiltoniids from Kangaroo Island in South Australia were collected and analysed using molecular (COI and 28S) and morphological methods in order to understand species distributional patterns and relationships. Kartachiltonia moodyi gen. nov., sp. nov., a spring-associated species endemic to the island, was discovered and populations of three additional mainland species (Austrochiltonia australis, A. dalhousiensis and A. subtenuis) were examined. The island populations of A. australis, A. dalhousiensis and A. subtenuis were found to form natural groups with differing haplotype coalescence times dating from the Early to Mid-Pleistocene. Numerous cycles of regional climate change throughout the Pleistocene are likely to have driven speciation in chiltoniid amphipods in southern Australia and the presence of multiple chiltoniid species at Kangaroo Island indicates that it exists at a likely convergence of species distribution patterns. Three possible hypotheses to explain the evolution and diversity of chiltoniids in southern Australia are discussed as are evidence for potential introduction and longdistance dispersal events.

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Implications of waterbird ecology for the dispersal of aquatic organisms

Cited by 204 publications

References 53 publications

The effect of water management on extensive aquaculture food webs in the reconstructed wetlands of the Doñana Natural Park, Southern Spain

The effect of water management on extensive aquaculture food webs in the reconstructed wetlands of the Doñana Natural Park, Southern Spain

Restoring macrophyte diversity in shallow temperate lakes: biotic versus abiotic constraints

Molecular evidence for mid-Pleistocene divergence of populations of three freshwater amphipod species (Talitroidea : Chiltoniidae) on Kangaroo Island, South Australia, with a new spring-associated genus and species

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