Tidal variation in fish assemblages and trophic structures in tropical Indo-Pacific seagrass beds

Lee, Chen‐Lu; Huang, Yen-Hsun; Chung, Chia-Yun; Lin, Hsing‐Juh

doi:10.1186/s40555-014-0056-9

Cited by 21 publications

(22 citation statements)

References 49 publications

(67 reference statements)

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“…The shallow northern waters (depth: 1-3 m) of Dongsha Island are often calm and clear and covered with high seagrass coverage (covering approximately 80-90% of the study area). Previous studies [30,31] showed a high abundance of reef fish, seagrass, and coral in the northern waters of Dongsha. Seagrass species in the canopies are mainly mixtures of Thalassia hemprichii, Cymodocea rotundata and Cymodocea serrulata.…”

Section: Study Sitementioning

confidence: 89%

“…In total, eight surveys were conducted bimonthly only during the warm season (from April to October) in 2010 and 2011 to avoid intense northeastern monsoons during the cool season and coincide with the main recruitment season for reef fishes at Dongsha Island [30]. The surveys were conducted using six 20 × 2 m replicated transects that had been placed at one of six haphazardly chosen locations in each of the four habitat types (Figure 1c).…”

Section: Study Sitementioning

confidence: 99%

“…All transects were carefully placed and at least 10 min were allowed to pass between establishment of transects and the commencement of underwater visual census (UVC) survey (conducted on SCUBA) to limit disturbance to the fish. All four habitat types were surveyed during flood tides between 9 am and 4 pm to avoid confounding effects resulting from tidal and diel fauna movement [30]. In total, we collected 24 datasets (4 habitat types, each with 6 replicate transects) at each of the eight survey times, leading to a total of 192 data points used in the analyses described below.…”

Section: Study Sitementioning

confidence: 99%

“…obsoletus, Let. harak (Lethrinidae) and Lutjanus fulviflamma (Lutjanidae) are all dominant carnivorous fish species around Dongsha Island [30], and they all clearly show ontogenetic habitat shifts from seagrass beds to coral reefs in their early life history stages [12,19,22]. We defined three body length categories to study ontogenetic habitat usage pattern according to our own and other previous studies [12,14,19]: (1) small (TL < 5 cm, newly recruited fish that feed mostly on small crustaceans), (2) medium (TL = 5-15 cm, juvenile stage, diets shift to large invertebrates, as mentioned below), and (3) large (TL > 15 cm, sub-adult to adult stage; [14,34]).…”

Section: Fish Surveysmentioning

confidence: 99%

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Ontogenetic Habitat Usage of Juvenile Carnivorous Fish Among Seagrass-Coral Mosaic Habitats

et al. 2019

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Seagrass beds and coral reefs are both considered critical habitats for reef fishes, and in tropical coastal regions, they often grow together to form “mosaic” habitats. Although reef fishes clearly inhabit such structurally complex environments, there is little known about their habitat usage in seagrass-coral mosaic habitats. The goal of this study was to examine potential factors that drive habitat usage pattern by juvenile reef fishes. We quantified (1) prey availability, (2) potential competitors, and 3) predators across a gradient of mosaic habitats (n = 4 habitat types) for four dominant carnivorous fishes (lethrinids and lutjanids) in the main recruitment season at Dongsha Island, South China Sea. We found that the coral-dominated habitats had not only a higher availability of large crustacean prey but also a higher abundance of competitors and predators of juvenile fishes. Food availability was the most important factor underlying the habitat usage pattern by lethrinids and lutjanids through ontogeny. The predation pressure exhibited a strong impact on small juvenile lethrinids but not on larger juveniles and lutjanids. The four juvenile fishes showed distinct habitat usage patterns through ontogeny. Collectively, mosaic habitats in the back reef system may be linked to key ontogenetic shifts in the early life histories of reef fishes between seagrass beds and coral reefs.

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Section: Study Sitementioning

confidence: 89%

Section: Study Sitementioning

confidence: 99%

Section: Study Sitementioning

confidence: 99%

Section: Fish Surveysmentioning

confidence: 99%

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Ontogenetic Habitat Usage of Juvenile Carnivorous Fish Among Seagrass-Coral Mosaic Habitats

et al. 2019

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“…In this case, the group of fish is the most dominant carnivores on seagrass beds in the study areas. Similarly, the group of fish carnivores contributed about 70% of the total fish abundance in seagrass beds at Donghsa Island's (Lee et al, 2014), but there was differences, the group of fish carnivores (20%) and herbivores (20%) in the Formoso River estuaryPernambuco, Brazil (Pereira et al, 2010). Besides that, (Appendix 6) showed that seagrass provides a diversity of fish food on seagrass in the study area.…”

Section: The Abundance and Diversity Of Fish As Indicators Of Seagrasmentioning

confidence: 86%

Threats to Seagrass Ecology and Indicators of the Importance of Seagrass Ecological Services in the Coastal Waters of East Lombok, Indonesia

Syukur

Wardiatno

Muchsin

et al. 2017

American Journal of Environmental Sciences

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Seagrass ecology contributes to the preservation of fish and other biota diversity and is also an important livelihood source for fishermen and local communities. The purpose of our research was (1) to determine the source of the threats toseagrass ecology and to the ecological services it provides for the sustainability of fish resources and (2) to determine the main indicators defining the conservation needs of seagrass in the study area. Data were collected through direct observation, questionnaires, interviews and discussions. Data for fish in the seagrass bed research sites were obtained using mini-trawlers belonging to local fishermen. All data were analyzed using descriptive statistical analyses. The results showed that seagrass beds play an important role in fish ecology and that local livelihoods were highly dependent on small-scale fishing. However, fishermen and local communities also constituted the two main threats to the preservation and sustainability of fish and other biota in the area. Our results found, too, that there is a scarcity of some types of biota: some fish species, mollusks, crabs, see-urchin and some types of sea cucumber were very difficult to find in the seagrass beds that were the focus of our study. Our conclusion is that, given the scarcity of fifteen species of fish, as well as of other biota and the lack of diversity in fish food in our study area, it is imperative that seagrass conservation becomes an important priority for conservation interventions.

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Populations and Communities

2021

Tropical Marine Ecology

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Tidal variation in fish assemblages and trophic structures in tropical Indo-Pacific seagrass beds

Cited by 21 publications

References 49 publications

Ontogenetic Habitat Usage of Juvenile Carnivorous Fish Among Seagrass-Coral Mosaic Habitats

Ontogenetic Habitat Usage of Juvenile Carnivorous Fish Among Seagrass-Coral Mosaic Habitats

Threats to Seagrass Ecology and Indicators of the Importance of Seagrass Ecological Services in the Coastal Waters of East Lombok, Indonesia

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