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Microhabitat partitioning between sympatric intertidal fish species highlights the importance of sediment composition in gravel beach conservation
Wagner, M.; Benac, C.; Pamic, M.; Bracun, S.; Ladner, M.; Plakolm, P.C.; Koblmüller, S.; Svardal, H.; Brandl, S.J. (2023). Microhabitat partitioning between sympatric intertidal fish species highlights the importance of sediment composition in gravel beach conservation. Ecol. Evol. 13(7): e10302. https://dx.doi.org/10.1002/ece3.10302
In: Ecology and Evolution. John Wiley & Sons: Chichester. ISSN 2045-7758; e-ISSN 2045-7758
|   |
| Trefwoorden |
Gouania Nardo, 1833 [WoRMS]; Gouania adriatica Wagner, Kovačić & Koblmüller, 2020 [WoRMS]; Gouania pigra (Nardo, 1827) [WoRMS]
Marien/Kust |
| Author keywords |
Adriatic Sea;Croatia;cryptobenthic fish;divergent ecological selection;ecological diversification;Mediterranean Sea;tourism;CLIMATE-CHANGE;COASTAL DEFENSE;KRK ISLAND;REEF;VULNERABILITY;NOURISHMENT;TELEOSTEI;GOBIIDAE;GOBIES;SEA |
| Auteurs | | Top |
- Wagner, M.
- Benac, C.
- Pamic, M.
|
- Bracun, S.
- Ladner, M.
- Plakolm, P.C.
|
- Koblmüller, S.
- Svardal, H.
- Brandl, S.J.
|
| Abstract |
Gravel beaches in the Mediterranean ecoregion represent an economically important and unique habitat type. Yet, burgeoning tourism, intensive coastal development and artificial nourishment of beaches may jeopardize their ecological communities. To date, species that reside on gravel beaches and the consequences of beach alterations are poorly understood, which hampers the development of a sustainable coastal tourism industry along the region's shorelines. Using a simple collection method based on dredging buckets through the intertidal section of beaches, we quantified the microhabitat association of two sympatric clingfish species in the genus Gouania at seven natural and an artificial gravel beach based on sediment characteristics. We hypothesized that slender (G. pigra) and stout (G. adriatica) morphotypes would partition interstitial niche space based on sediment size, which may affect the vulnerability of the species to changes in gravel beach composition due to coastal development. We detected substantial differences in gravel composition within and among the sampled beaches which suggests scope for microhabitat partitioning in Gouania. Indeed, we found significant relationships between species identity and the presence/absence and abundance of individuals in hauls based on their positioning on PC1. Our results suggest that modifications of gravel beaches through coastal development, including beach nourishment, intensifying coastal erosion, or artificial beach creation, may have detrimental consequences for the two species if sediment types or sizes are altered. We posit that, given the simplicity and efficacy of our sampling method and the sensitivity of Gouania species to prevailing gravel composition, the genus could serve as an important indicator for gravel beach management in the Mediterranean ecoregion. |
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