Low biomass of macrobenthic fauna at a tropical mudflat: An effect of latitude?

Purwoko, Agus; Wolff, W.J.

doi:10.1016/j.ecss.2007.08.013

Cited by 13 publications

(10 citation statements)

References 8 publications

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“…; Mathot et al. ; Purwoko and Wolff ) and now also in primary productivity in this study for both hemispheres. Secondly , migrants experience long days for most of the year by crossing the equator.…”

Section: Discussionsupporting

confidence: 72%

Why fly the extra mile? Latitudinal trend in migratory fuel deposition rate as driver of trans‐equatorial long‐distance migration

Aharon‐Rotman

Gosbell²,

Minton³

et al. 2016

Ecology and Evolution

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Trans‐equatorial long‐distance migrations of high‐latitude breeding animals have been attributed to narrow ecological niche widths. We suggest an alternative hypothesis postulating that trans‐equatorial migrations result from a possible increase in the rate at which body stores to fuel migration are deposited with absolute latitude; that is, longer, migrations away from the breeding grounds surpassing the equator may actually enhance fueling rates on the nonbreeding grounds and therewith the chance of a successful, speedy and timely migration back to the breeding grounds. To this end, we first sought to confirm the existence of a latitudinal trend in fuel deposition rate in a global data set of free‐living migratory shorebirds and investigated the potential factors causing this trend. We next tested two predictions on how this trend is expected to impact the migratory itineraries on northward migration under the time‐minimization hypothesis, using 56 tracks of high‐latitude breeding shorebirds migrating along the East Asian‐Australasian Flyway. We found a strong positive effect of latitude on fuel deposition rate, which most likely relates to latitudinal variations in primary productivity and available daily foraging time. We next confirmed the resulting predictions that (1) when flying from a stopover site toward the equator, migrants use long jumps that will take them to an equivalent or higher latitude at the opposite hemisphere; and (2) that from here onward, migrants will use small steps, basically fueling only enough to make it to the next suitable staging site. These findings may explain why migrants migrate “the extra mile” across the equator during the nonbreeding season in search of better fueling conditions, ultimately providing secure and fast return migrations to the breeding grounds in the opposite hemisphere.

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Section: Discussionsupporting

confidence: 72%

Why fly the extra mile? Latitudinal trend in migratory fuel deposition rate as driver of trans‐equatorial long‐distance migration

Aharon‐Rotman

Gosbell²,

Minton³

et al. 2016

Ecology and Evolution

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“…Tropical environments have been explored more recently (Stella et al, 2011), despite some early studies in Asia (Broom, 1982;Lui et al, 2002;Purwoko and Wolff, 2008), America (Vargas, 1988;Fernandes and Soares-Gomes, 2006), the Pacific islands (Dittmann, 1996(Dittmann, , 2000Frouin and Hutchings, 2001) and the Indian Ocean (deBoer and Prins, 2002;Mackie et al, 2005). So far, inventories and quantitative descriptions of invertebrate assemblages in New Caledonia have been limited to very few studies devoted to subtidal communities (Chardy and Clavier, 1988;Garrigue et al, 1998) or to the description of some intertidal populations (Baron and Clavier, 1992;Dumas et al, 2013).…”

Section: Description Of Benthic Communities and Comparisonsmentioning

confidence: 97%

Harvesting effects on tropical invertebrate assemblages in New Caledonia

et al. 2015

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International audienceDespite the importance of invertebrate resources for Pacific coral reef islands, few studies have specifically addressed the effects of harvesting on invertebrate assemblages including targeted and non-targeted species. The impacts of recreational harvesting on reef and seagrass invertebrate assemblages in New Caledonia (South Pacific) are investigated by comparing communities in non-MPA and MPA areas. Sampling was done using a standard core method on seagrasses and by visual survey along belt transects on reefs. A total of 371 species were recorded, 174 on seagrasses and 254 on reefs, with 57 common species. Reef and seagrass invertebrate communities were very different in MPA and non-MPA areas. On both habitats, MPAs were identified as undisturbed areas while non-MPAs were defined as moderately disturbed with a predominance of small-sized and opportunistic species. Fishing not only affects target species but also non-target species through secondary effects. These results highlight the necessity of a community based approach for the conservation of resources in tropical poorly known environments

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“…The details and background of the model are specified in Aharon-Rotman et al (2015a). Briefly, published data on FDR in migratory shorebirds was used (Warwick and Ruswahyuni 1987;Piersma et al 1993;Masero et al 1999;Ricciardi and Bourget 1999;Kober and Bairlein 2006;Jing et al 2007;Purwoko and Wolff 2008) and, after correcting for lean body mass (Lindström 2003) and for multiple species using a phylogenetic mixed model, a significant correlation between FDR and absolute latitude was found. The correlation between fuelling rates and absolute latitude was previously shown also in red knot Calidris canutus worldwide ) and western sandpiper Calidris mauri in America (Williams et al 2007).…”

Section: Fuel Deposition Ratesmentioning

confidence: 99%

Why fly the extra mile? Using stress biomarkers to assess wintering habitat quality in migratory shorebirds

et al. 2016

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Migratory birds make decisions about how far to travel based on cost-benefit trade-offs. However, in many cases the net effect of these trade-offs is unclear. We sought to address this question by measuring feather corticosterone (CORTf), leucocyte profile, avian malaria parasite prevalence and estimating fueling rates in three spatially segregated wintering populations of the migratory shorebird ruddy turnstone Arenaria interpres during their stay in the winter habitat. These birds fly from the high-Arctic breeding ground to Australia, but differ in that some decide to end their migration early (Broome, Western Australia), whereas others travel further to either South Australia or Tasmania. We hypothesized that the extra costs in birds migrating greater distances and overwintering in colder climates would be offset by benefits when reaching their destination. This would be evidenced by lower stress biomarkers in populations that travel further, owing to the expected benefits of greater resources and improved vitality. We show that avian malaria prevalence and physiological stress levels were lower in birds flying to South Australia and Tasmania than those overwintering in Broome. Furthermore, our modeling predicts that birds in the southernmost locations enjoy higher fueling rates. Our data are consistent with the interpretation that birds occupying more costly wintering locations in terms of higher migratory flight and thermoregulatory costs are compensated by better feeding conditions and lower blood parasite infections, which facilitates timely and speedy migration back to the breeding ground. These data contribute to our understanding of cost-benefit trade-offs in the decision making underlying migratory behaviour.

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Low biomass of macrobenthic fauna at a tropical mudflat: An effect of latitude?

Cited by 13 publications

References 8 publications

Why fly the extra mile? Latitudinal trend in migratory fuel deposition rate as driver of trans‐equatorial long‐distance migration

Why fly the extra mile? Latitudinal trend in migratory fuel deposition rate as driver of trans‐equatorial long‐distance migration

Harvesting effects on tropical invertebrate assemblages in New Caledonia

Why fly the extra mile? Using stress biomarkers to assess wintering habitat quality in migratory shorebirds

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