Human trampling decreases surface activity and disturbs behavioral rhythm of an endangered intertidal crab

Human recreational visits to tidal flats increase trampling pressure, which has a significant impact on the coastal benthic ecosystem. The fiddler crab Austruca lactea, which inhabits the upper intertidal region, is endangered in temperate regions such as Japan and South Korea. The vulnerability of...

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Autores principales:	Seojeong Park, Tae Won Kim
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Anthropogenic disturbance Fiddler crab Flagship species Monitoring Recreation ecology Tidal rhythm Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/b33cbf580fa54077ad82b5d142324716
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spelling	oai:doaj.org-article:b33cbf580fa54077ad82b5d1423247162021-12-01T05:00:09ZHuman trampling decreases surface activity and disturbs behavioral rhythm of an endangered intertidal crab1470-160X10.1016/j.ecolind.2021.108178https://doaj.org/article/b33cbf580fa54077ad82b5d1423247162021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21008438https://doaj.org/toc/1470-160XHuman recreational visits to tidal flats increase trampling pressure, which has a significant impact on the coastal benthic ecosystem. The fiddler crab Austruca lactea, which inhabits the upper intertidal region, is endangered in temperate regions such as Japan and South Korea. The vulnerability of their habitat to human activities along with their limited summer reproduction period may have contributed to the decrease in fiddler crab populations in these regions. We conducted experiments to elucidate the effects of trampling on the surface activities and courtship behaviors of A. lactea, which represent ecological indicators for tidal flat ecosystems. During the 46-day trampling period, we observed the number of active crabs on the surface of the tidal flat under three different trampling intensities (heavy trampling = 60 steps/m2; moderate trampling = 20 steps/m2; and no trampling). The density of individuals of both sexes active on the surface and that of courting males significantly decreased under both heavy and moderate trampling intensities. In addition, the feeding and courtship rhythms of male A. lactea collapsed under continuous trampling events. We monitored the site once per week, and surface activity did not recover fully until the sixth week after the trampling period. Our results demonstrated that trampling on the tidal flat disrupted the intensity and timing of crab surface behavior and male reproductive surface behavior, and thus may, ultimately, have an impact on the population dynamics of A. lactea.Seojeong ParkTae Won KimElsevierarticleAnthropogenic disturbanceFiddler crabFlagship speciesMonitoringRecreation ecologyTidal rhythmEcologyQH540-549.5ENEcological Indicators, Vol 131, Iss , Pp 108178- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Anthropogenic disturbance Fiddler crab Flagship species Monitoring Recreation ecology Tidal rhythm Ecology QH540-549.5
spellingShingle	Anthropogenic disturbance Fiddler crab Flagship species Monitoring Recreation ecology Tidal rhythm Ecology QH540-549.5 Seojeong Park Tae Won Kim Human trampling decreases surface activity and disturbs behavioral rhythm of an endangered intertidal crab
description	Human recreational visits to tidal flats increase trampling pressure, which has a significant impact on the coastal benthic ecosystem. The fiddler crab Austruca lactea, which inhabits the upper intertidal region, is endangered in temperate regions such as Japan and South Korea. The vulnerability of their habitat to human activities along with their limited summer reproduction period may have contributed to the decrease in fiddler crab populations in these regions. We conducted experiments to elucidate the effects of trampling on the surface activities and courtship behaviors of A. lactea, which represent ecological indicators for tidal flat ecosystems. During the 46-day trampling period, we observed the number of active crabs on the surface of the tidal flat under three different trampling intensities (heavy trampling = 60 steps/m2; moderate trampling = 20 steps/m2; and no trampling). The density of individuals of both sexes active on the surface and that of courting males significantly decreased under both heavy and moderate trampling intensities. In addition, the feeding and courtship rhythms of male A. lactea collapsed under continuous trampling events. We monitored the site once per week, and surface activity did not recover fully until the sixth week after the trampling period. Our results demonstrated that trampling on the tidal flat disrupted the intensity and timing of crab surface behavior and male reproductive surface behavior, and thus may, ultimately, have an impact on the population dynamics of A. lactea.
format	article
author	Seojeong Park Tae Won Kim
author_facet	Seojeong Park Tae Won Kim
author_sort	Seojeong Park
title	Human trampling decreases surface activity and disturbs behavioral rhythm of an endangered intertidal crab
title_short	Human trampling decreases surface activity and disturbs behavioral rhythm of an endangered intertidal crab
title_full	Human trampling decreases surface activity and disturbs behavioral rhythm of an endangered intertidal crab
title_fullStr	Human trampling decreases surface activity and disturbs behavioral rhythm of an endangered intertidal crab
title_full_unstemmed	Human trampling decreases surface activity and disturbs behavioral rhythm of an endangered intertidal crab
title_sort	human trampling decreases surface activity and disturbs behavioral rhythm of an endangered intertidal crab
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/b33cbf580fa54077ad82b5d142324716
work_keys_str_mv	AT seojeongpark humantramplingdecreasessurfaceactivityanddisturbsbehavioralrhythmofanendangeredintertidalcrab AT taewonkim humantramplingdecreasessurfaceactivityanddisturbsbehavioralrhythmofanendangeredintertidalcrab
_version_	1718405622173532160

Human trampling decreases surface activity and disturbs behavioral rhythm of an endangered intertidal crab

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