scholarly journals Crustacean Decapod Assemblage Associated with Seagrass (Zostera marina) Beds in Southern Waters of Korea

Diversity ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 89
Author(s):  
Joo Myun Park ◽  
Seok Nam Kwak ◽  
Ralf Riedel
Keyword(s):  
Species Richness ◽  
Zostera Marina ◽  
Habitat Type ◽  
Species Number ◽  
Seagrass Beds ◽  
Diel Patterns ◽  
Palaemon Macrodactylus ◽  
Catch Rates ◽  
Species Richness And Abundance ◽  
A Minor

Decapod assemblages in Zostera marina beds from two bays adjacent to unvegetated habitats were investigated to assess their influence on decapod assemblages. Thirty-eight decapod species belonging to four taxa were collected using a small beam trawl at four habitat types from two different locations off the coast of Namhae Island, South Korea. Dominant decapod taxon at all habitats was the caridean shrimps, with Eualus leptognathus, Heptacarpus pandaloides, Latreutes anoplonyx, La. Laminirostris, and Palaemon macrodactylus being the most abundant caridean species. Crabs were characterized with the highest biomass, but with moderate species richness and abundance. Penaeoid and sergestoid shrimps only accounted for <1% of the total decapod abundance. The number of species and their abundance of decapod assemblages varied greatly by habitat type, season, and diel patterns, but not diversity. Species number and abundance peaked in seagrass beds of southern exposed bays during the autumn and were lowest in unvegetated habitats during the summer months. Diel decapod catch rates were higher at night. Dense seagrass vegetation and nighttime supported higher decapod mean densities, but not species richness and diversity. Multivariate analyses revealed that habitat type and season significantly affected the structure of decapod assemblages, but diel patterns had a minor influence. Among decapod species, Pa. macrodactylus and Pugettia quadridens characterized the decapod assemblages in seagrass beds at the northern semi-closed bay, while Telmessus acutidens, Crangon affinis, Cr. hakodatei, Charybdis (Charybdis) japonica, and Portunus sanguinolentus were significantly associated with both vegetated and unvegetated habitats at the southern exposed bay, with the former two species more abundant during the colder season.

scholarly journals Crustacean Decapod Assemblage Associated with Seagrass (Zostera marina) Beds in Southern Waters of Korea

2019 ◽  
Author(s):  
Joo Myun Park ◽  
Seok Nam Kwak ◽  
Ralf Reidel
Keyword(s):  
Species Richness ◽  
Zostera Marina ◽  
Habitat Type ◽  
Species Number ◽  
Seagrass Beds ◽  
Diel Patterns ◽  
Palaemon Macrodactylus ◽  
Southern Korea ◽  
Species Richness And Abundance ◽  
A Minor

Decapod assemblages in Zostera marina beds from two bays adjacent to unvegetated habitats were investigated to assess their influence on decapod assemblages. Thirty-eight decapod species belonging to 4 taxa were collected using a small beam trawl at four habitat types from two different locations off the coast of Namhae Island, southern Korea. Dominant decapod taxon at all habitats was the caridean shrimps, with Eualus leptognathus, Heptacarpus pandaloides, Latreutes anoplonyx, La. laminirostris and Palaemon macrodactylus being the most abundant caridean species. Crabs were characterized by the highest biomass, but moderate species richness and abundance. Penaeoids and sergestoids shrimps only accounted for &lt;1% of the total decapod abundance. The number of species, their abundance, and the diversity of decapod assemblages varied greatly by habitat type, season, and diel patterns. Species number and abundance peaked in seagrass beds of southern exposed bays during the autumn, and were lowest in unvegetated habitats during the summer months. Diel decapod species and catch rates were higher at night. Dense seagrass vegetation and nighttime supported greater decapod species richness and higher mean densities, but not diversity. Multivariate analyses revealed that habitat type and season significantly affected the structure of decapod assemblages, but diel patterns had a minor influence. Among decapod species, Pa. macrodactylus and Pugettia quadridens characterized the decapod assemblages in seagrass beds at the northern semi-closed bay, while Telmessus acutidens, Crangon affinis, Cr. hakodatei, Charybdis japonica and Portunus sanguinolentus were significantly associated with both vegetated and unvegetated habitats at the southern exposed bay, with the former two species more abundant during winter and spring.

scholarly journals Edge effects and landscape matrix use by a small mammal community in fragments of semideciduous submontane forest in Mato Grosso, Brazil

2008 ◽  
Vol 68 (4) ◽  
pp. 703-710 ◽  
Author(s):  
M. Santos-Filho ◽  
DJ. da Silva ◽  
TM. Sanaiotti
Keyword(s):  
Species Richness ◽  
Small Mammal ◽  
Species Number ◽  
Sampling Effort ◽  
Similar Species ◽  
Species Accumulation Curves ◽  
Mammal Species ◽  
Mato Grosso ◽  
Species Accumulation ◽  
Species Richness And Abundance

A community of small mammals was studied in seasonal semideciduous submontane forest in the state of Mato Grosso, Brazil. This study evaluated the use of edge and matrix pasture, by different small mammal species. Overall, 31 areas were studied, with a total sampling effort of 33,800 trap x nights. Only seven of the 25 species captured in the study sites were able to use the pasture matrix; we classified these species as generalists. Fourteen species were found to be intermediate in habits, being able to use forest edges. We found only four species habitat specialists, occurring only on transect lines in the interior of the fragment, at least 150 m from the edge. Transects located in the pasture matrix and 50 m from the edge had significantly lower species richness and abundance than transects located in the fragment edge or in the interior of the fragment. All transects located within the fragment had similar species richness and abundance, but transects located 50 m from the edge had slightly lower, but non-significant, species richness than transects located 100 m apart from edges. Rarefaction curves demonstrated that only medium-sized fragments (100 300 ha) reached an asymptote of species accumulation. The other areas require further sampling, or more sampling transect, before species accumulation curves stabilize, due to a continued increase in species number.

scholarly journals Patterns of Species Richness and Abundance in Badingilo National Park in South Sudan

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Thomas Francis Lado ◽  
David Gwolo Phanuel Mogga ◽  
Richard Angelo Lado Benjamin
Keyword(s):  
Species Richness ◽  
National Park ◽  
Habitat Type ◽  
Bird Species ◽  
Abundant Species ◽  
Point Count ◽  
Number Of Species ◽  
Riverine Habitat ◽  
Species Richness And Abundance ◽  
Point Count Method

The study was carried out to determine patterns of birds’ species richness, alpha and beta diversities; and abundance in Badingilo national park using a 10 m fixed-radius point count method. A total of 2670 individuals were recorded from 182 points in the park. The highest expected number of species (Jack1 estimator) was observed in the Riverine habitat and least was in the Agriculture and Human settlement habitat type. The total number of species observed in the park was 63; however Jack1 estimator indicated that there were 68 species in the park. The majority of the birds observed during the study were resident species, few migratory and Palaearctic bird species. Few birds observed in the park were abundant. The most abundant species was the village weaver (381 individuals), and the rarest species were black-bellied bustard, barn owl, black scimitar bill and tree pipit (one individual each).

scholarly journals Preliminary data on the Posidonia meadows and associated macrozoobenthic community of Sazani island (Albania)

2015 ◽  
Author(s):  
Jula Selmani ◽  
Stela Ruci ◽  
Denada Kasemi ◽  
Sajmir Beqiraj ◽  
Lefter Kashta
Keyword(s):  
Species Richness ◽  
Marine Protected Area ◽  
Rapid Assessment ◽  
Posidonia Oceanica ◽  
The State ◽  
Macroinvertebrate Community ◽  
Eastern Coast ◽  
Benthic Macroinvertebrate ◽  
Species Number ◽  
Species Richness And Abundance

The seagrass Posidonia oceanica meadows are scarcely studied in the Albanian coast. Data presented in this work have been collected during an assessment of benthic communities of Sazani Island, Albania, in May 2013. The P. oceanica meadow has a limited distribution around this island, covering a relatively small area on its eastern coast. Although this meadow seems to be under degradation, it is still a good shelter for high species number and high abundance of benthic macroinvertebrates. The highest species richness and abundance has been recorded for sponges, hydrozoans, gastropods, bivalves, polychaetes, echinoderms, bryozoans and ascidians. The sciaphilic and photophilic communities were clearly evident, associated respectively to the P. oceanica rhizomes and leaves. Referring to the species richness and abundance, a rapid assessment of ecological and environmental state of benthic macroinvertebrate community has been done. Other parameters used for the assessment of the state of P. oceanica meadow have also been recorded, and possible reasons for the degradation of the meadow have been highlighted. These assessments of the benthic macroinvertebrate community and the state of seagrass meadow are also important within the framework of monitoring, conservation and management of the only Marine Protected Area of Albania, where Sazani Island is a core area.

scholarly journals Taking a deeper look: Quantifying the differences in fish assemblages between shallow and mesophotic temperate rocky reefs

2018 ◽  
Author(s):  
Joel Williams ◽  
Alan Jordan ◽  
David Harasti ◽  
Peter Davies ◽  
Tim Ingleton
Keyword(s):  
Species Richness ◽  
Linear Models ◽  
Fish Assemblages ◽  
Habitat Type ◽  
Rocky Reefs ◽  
Temperate Reefs ◽  
Video Systems ◽  
Parsimonious Model ◽  
Using Data ◽  
Species Richness And Abundance

AbstractThe spatial distribution of a species assemblage is often determined by habitat and climate. In the marine environment, depth can become an important factor as degrading light leads to changes in the biological habitat structure. To date, much of the focus of ecological fish research has been based on reefs in less than 40 m with little research on the ecological role of mesophotic reefs. We deployed baited remote underwater stereo video systems (stereo-BRUVS) on temperate reefs in two depth categories: shallow (20-40m) and mesophotic (80-120m), off Port Stephens, Australia. Sites were selected using data collected by swath acoustic sounder to ensure stereo-BRUVS were deployed on reef. The sounder also provided rugosity, slope and relief data for each stereo-BRUVS deployment. Multivariate analysis indicates that there are significant differences in the fish assemblages between shallow and mesophotic reefs, primarily driven by Ophthalmolepis lineolatus and Notolabrus gymnogenis only occurring on shallow reefs and schooling species of fish that were unique to each depth category: Atypichthys strigatus on shallow reefs and Centroberyx affinis on mesophotic reefs. While shallow reefs had a greater species richness and abundance of fish when compared to mesophotic reefs, mesophotic reefs hosted the same species richness of fishery targeted species. Chrysophrys auratus (pink snapper) and Nemodactylus douglassii (grey morwong) are two highly targeted species in this region. While C. auratus was numerically more abundant on shallow reefs, mesophotic reefs provide habitat for larger fish. In comparison, N. douglassii were evenly distributed across all sites sampled. Generalized linear models revealed that depth and habitat type provided the most parsimonious model for predicting the distribution of C. auratus, while habitat type alone best predicted the distribution of N. douglassii. These results demonstrate the importance of mesophotic reefs to fishery targeted species and therefore have implications for informing the management of these fishery resources on shelf rocky reefs.

scholarly journals Contrasting effects of altitude on species groups with different traits in a non-fragmented montane temperate forest

2019 ◽  
Vol 37 ◽  
pp. 99-121 ◽  
Author(s):  
Maarten de Groot ◽  
Al Vrezec
Keyword(s):  
Species Richness ◽  
Species Turnover ◽  
Habitat Type ◽  
Carabid Beetles ◽  
Dispersal Ability ◽  
Altitudinal Distribution ◽  
Mobile Species ◽  
Altitudinal Belts ◽  
Species Groups ◽  
Species Richness And Abundance

Temperature has strong effects on species composition and traits. These effects can differ within and between species groups. Thermoregulation and mobility are traits which can be strongly affected by altitudinal distribution. Our aim was to investigate the influence of altitude on the species richness, abundance and composition of species groups with different trophic, thermoregulatory and mobility traits. Carabids (Coleoptera; Carabidae), hoverflies (Diptera: Syrphidae) and birds (Aves: Passeriformes) were counted in three altitudinal belts with a total elevation difference of 700 m (from 300 m to 1000 m a.s.l.) in the same habitat type (non-fragmented temperate montane mixed beech and fir forest). We found that endotherms and more mobile species (i.e. birds) had a smaller turnover than ectotherms (i.e. hoverflies) and less mobile species (i.e. carabids), from which we can predict that the former species will undergo a less extreme shift than the latter in global warming scenarios. Species turnover across the altitudinal gradient increased from birds to hoverflies to carabid beetles. The effect of altitude on phenology was different between the studied ectotherm species groups (carabids and hoverflies). Hoverflies experience a phenological delay of species richness and abundance at higher altitudes in spring, but not at the end of summer, which implies that hoverfly phenology is affected by a change in temperature, while carabid beetle abundance exhibited a delay in phenology in summer at higher altitudes. We suggest that species that are expected to be most affected by climate change, such as ectotherms and species with poor dispersal ability should be prioritised as the best indicators for monitoring and conservation management purposes.

A preliminary survey of cryobiontic algal communities from Cierva Point (Antarctic Peninsula)

1997 ◽  
Vol 9 (3) ◽  
pp. 250-258 ◽  
Author(s):  
Gabriela Mataloni ◽  
Gustavo Tesolín
Keyword(s):  
Species Richness ◽  
Antarctic Peninsula ◽  
Stress Factors ◽  
Species Number ◽  
Preliminary Survey ◽  
Dominant Group ◽  
Algal Communities ◽  
Secondary Carotenoids ◽  
Low Altitude ◽  
Species Richness And Abundance

Algal communities colouring snow and ice were studied at fourteen sites on Cierva Point (Danco Coast, Antarctic Peninsula). Chlorophyta were the dominant group in cryobiontic communities, both in species richness and abundance. Cyanobacteria and diatoms, in turn, showed a higher species number at low altitude, well drained temporary snow fields, probably denoting a cryoxenic character. Descriptions of the six species newly recorded for Antarctica are given, and the taxonomic position of some Scotiella, Trochiscia and Koliella species is discussed. Further research is needed to assess the importance of various stress factors in the progressive drop in species richness and biosynthesis of secondary carotenoids associated with a change in snow colour from green to orange-red to pink-red.

Floodplain amphibian abundance: responses to flooding and habitat type in Barmah Forest, Murray River, Australia

2014 ◽  
Vol 41 (2) ◽  
pp. 149 ◽  
Author(s):  
Heather M. McGinness ◽  
Anthony D. Arthur ◽  
Keith A. Ward ◽  
Paula A. Ward
Keyword(s):  
Species Richness ◽  
Environmental Flows ◽  
Seasonal Pattern ◽  
Habitat Type ◽  
Flood Frequency ◽  
Individual Species ◽  
Seasonal Timing ◽  
Murray River ◽  
Frog Species ◽  
Species Richness And Abundance

Context Frog species are now targets for delivery of high-value managed environmental flows on floodplains. Information on the drivers of frog presence and abundance is required to support adaptive management, including analysis of the roles of flood frequency, flood timing and habitat type. Aims This paper describes frog species richness and abundance responses to flooding and habitat type in the Barmah Forest, part of the largest river red gum forest in the world. Methods Surveys were conducted at 22 sites over 6 years, to determine species presence, relative abundance, and evidence of breeding. Data were then used to examine temporal patterns within and between wet and dry years and spatial relationships with site geomorphology, vegetation form and wetting frequency. Key results Six species were common and widespread, and three were rare. The seasonal timing of peak numbers of calling males differed among species. The seasonal pattern of calling for each species did not differ between wet and dry years; however, significantly lower numbers of frogs were recorded calling in dry years. The number of frogs calling was significantly higher in well vegetated grassy wetlands. Evidence of a positive relationship between wetting frequency and numbers of calling males was found for Limnodynastes fletcheri, Crinia signifera and Limnodynastes dumerilii. The abundance of tadpoles was significantly higher in wet years. Conclusions The seasonal timing of flooding in Barmah Forest will influence the breeding success of individual species with different preferences. Flooding from September to December is required to cover most preferred breeding seasons, but longer durations may be required to maximise recruitment. This, together with regular flooding of well vegetated grassy wetland habitat, will increase the likelihood of species persistence and maximise diversity. Insufficient flooding frequency will result in reduced frog species richness and abundance. Implications Managed flooding is important for frog abundance and species richness. This study emphasises the value of key habitats such as well vegetated grassy wetlands and reinforces the need to make their preservation a priority for management. It has identified knowledge gaps to drive future data collection for improved modelling, including a need for further research on flow-regime change and frog communities.

Seasonal and habitat structures of crustacean decapod assemblages associated with Zostera marina beds in northern Jinhae Bay, Korea

2018 ◽  
Vol 99 (2) ◽  
pp. 461-471 ◽  
Author(s):  
Joo Myun Park ◽  
Seok Nam Kwak
Keyword(s):  
Water Temperature ◽  
Zostera Marina ◽  
Multivariate Analyses ◽  
Habitat Type ◽  
Factors Affecting ◽  
Palaemon Macrodactylus ◽  
Charybdis Japonica ◽  
Jinhae Bay ◽  
Abundance And Diversity ◽  
Eelgrass Beds

Crustacean decapod assemblages were surveyed in Zostera marina beds adjacent to tidal flats (ET) and rocky shore (ER), and in unvegetated habitats (UV). Decapod samples were collected monthly throughout 2002 using a small beam trawl from northern Jinhae Bay, Korea. Water temperature, salinity, eelgrass biomass, sediment composition and organic matter were also monitored to assess any correlation between environmental variables and decapod fauna. A total of 31 decapod species belonging to five taxa (three prawns, 13 caridean shrimps, one hermit crab, one mud shrimp and 13 crabs) were collected at three different habitats. To assess variations in decapod assemblages in relation to habitat type and season, various multivariate analyses were used. The dominant caridean shrimps were Palaemon macrodactylus, Alpheus digitalis and Crangon uritai, and the dominant crabs were Charybdis japonica, Hemigrapsus penicillatus and Charybdis bimaculata. The number, abundance and diversity of decapod species varied greatly with habitat type and season, peaking in eelgrass beds and during spring, and showing the lowest catch rate in unvegetated habitat and during winter months. The nMDS ordination and multivariate analyses revealed that habitat type and season were determinant factors affecting the structure of decapod assemblages. Seasonal shifts in the abundance of decapods corresponded with changes in eelgrass biomass and loss on ignition (LOI), but not with water temperature or salinity.

scholarly journals Preliminary data on the Posidonia meadows and associated macrozoobenthic community of Sazani island (Albania)

2015 ◽  
Author(s):  
Jula Selmani ◽  
Stela Ruci ◽  
Denada Kasemi ◽  
Sajmir Beqiraj ◽  
Lefter Kashta
Keyword(s):  
Species Richness ◽  
Marine Protected Area ◽  
Rapid Assessment ◽  
Posidonia Oceanica ◽  
The State ◽  
Macroinvertebrate Community ◽  
Eastern Coast ◽  
Benthic Macroinvertebrate ◽  
Species Number ◽  
Species Richness And Abundance

The seagrass Posidonia oceanica meadows are scarcely studied in the Albanian coast. Data presented in this work have been collected during an assessment of benthic communities of Sazani Island, Albania, in May 2013. The P. oceanica meadow has a limited distribution around this island, covering a relatively small area on its eastern coast. Although this meadow seems to be under degradation, it is still a good shelter for high species number and high abundance of benthic macroinvertebrates. The highest species richness and abundance has been recorded for sponges, hydrozoans, gastropods, bivalves, polychaetes, echinoderms, bryozoans and ascidians. The sciaphilic and photophilic communities were clearly evident, associated respectively to the P. oceanica rhizomes and leaves. Referring to the species richness and abundance, a rapid assessment of ecological and environmental state of benthic macroinvertebrate community has been done. Other parameters used for the assessment of the state of P. oceanica meadow have also been recorded, and possible reasons for the degradation of the meadow have been highlighted. These assessments of the benthic macroinvertebrate community and the state of seagrass meadow are also important within the framework of monitoring, conservation and management of the only Marine Protected Area of Albania, where Sazani Island is a core area.

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