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M. L. Carmona

Bio: M. L. Carmona is an academic researcher. The author has contributed to research in topics: Plankton & Species diversity. The author has an hindex of 3, co-authored 4 publications receiving 23 citations.

Papers
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Journal Article
TL;DR: In this paper, the Bacillariopphyceae or commonly known as diatoms were identified as the chief component of the phytoplankton community in Casiguran Sound and Bay, Aurora Province, Philippines.
Abstract: Phytoplankton composition, diversity, abundance and their relation with the physico-chemical parameters of the waters during high and low tides in the thirteen sampling stations in Casiguran Sound and Bay, Aurora Province, Philippines were compared. A total of 115 species belonging to four major groups (Bacillariopphyceae, Dinophyceae, Dictyochophyceae, and Cyanophyceae) were identified, with the Bacillariopphyceae or commonly known as diatoms being the chief component of the phytoplankton. Using several diversity indices, results showed no differences in the phytoplankton species between Casiguran sound and bay during the two tidal cycles. Likewise, the results of NPMANOVA revealed no significant differences (p>0.05) in phytoplankton relative abundance between and within sampling stations between and during high and low tides. The results may imply that the level of phytoplankton diversity and abundance did not fluctuate with changes in the tide levels and that phytoplankton species were thus uniformly distributed in the waters of Casiguran. It is suggested that the alteration of high and low tides accompanied by intense horizontal and vertical mixing which are apparent during spring tide may have influence the uniform distribution of phytoplankton. Since results of the study reflect the importance of physical as well as chemical factors of the water on the phytoplankton community structure, the present records are essentially vital in order to assess further the relationship between environmental conditions of the water and the organisms and to evaluate future development towards conservation and management in the said areas.

12 citations

01 Jan 2015
TL;DR: In this article, the authors compared the composition, diversity, abundance of mesozooplankton and their relation with the hydrological conditions of the waters in Baler Bay, Aurora, Northern Philippines.
Abstract: Composition, diversity, abundance of mesozooplankton and their relation with the hydrological conditions of the waters in Baler Bay, Aurora, Northern Philippines were compared. A total of 122 taxa belonging to 9 major groups were categorized. Copepoda comprises the chief constituent of the mesozooplankton community with Canthocalanus pauper, Oncaea venusta, Centropages furcatus, Acrocalanus gibber, Calanopia elliptica and Candacia catula being the most abundant and widely distributed copepods in the said area. Using several diversity indices, high diversity and evenness but low dominance values in the mesozooplankton taxa was observed in the five sampling stations. Results of Kruskal-Walis Test revealed significant differences (p<0.05) in the mesozooplankton relative abundance between the sampling stations. Further, results of Canonical Correspondence Analysis revealed total suspended solids (TSS) in influencing the mesozooplankton abundance. In view of the role of copepods as key contributors of the marine zooplankton and their position in the marine food webs, the present findings are therefore important in understanding the dynamics of any marine ecosystems and are vital in terms of managing and conserving the marine resources.

4 citations

Journal Article
TL;DR: In this paper, mesozooplankton composition, diversity, abundance and their relation with the physicochemical parameters of the waters during high and low tides in San Ildefonso Cape, Aurora Province, Philippines were compared.
Abstract: Mesozooplankton composition, diversity, abundance and their relation with the physicochemical parameters of the waters during high and low tides in San Ildefonso Cape, Aurora Province, Philippines were compared. A total of 60 species belonging to 9 major groups were identified. Copepoda constituted the major bulk of the mesozooplankton community with Paracalanus parvus, Corycaeus andrewsii, Oithona similis and Oncaea venusta being the most abundant and widely distributed copepods in the said area. Using several diversity indices, high diversity in the mesozooplankton taxa was observed, but no differences were seen between the sampling stations and between the two tidal cycles. Likewise, the results of NPMANOVA revealed no significant differences (p>0.05) in mesozooplankton relative abundance between and within sampling stations between and during high and low tides. The results may imply that the level of mesozooplankton diversity and abundance did not fluctuate with changes in the tide levels and that mesozooplankton taxa were thus uniformly distributed in the waters of San Ildefonso Cape. Results of Canonical Correspondence Analysis revealed dissolved oxygen in influencing the mesozooplankton composition and abundance; however other factors (i.e. Kuroshio current) may also be important in shaping the community structure of mesozooplankton. Considering the importance of copepods as major component of the marine zooplankton and its function in marine food webs, the present records are therefore crucial in understanding the dynamics of marine ecosystems and are necessary for purposes of management and conservation of marine resources.

4 citations

Journal Article
TL;DR: In this article, the authors compared the diversity, composition and abundance of mesozooplankton and their relation with the physicochemical parameters of the waters during low and high tides in Casiguran waters, Aurora, Northern Philippines were compared.
Abstract: Diversity, composition and abundance of mesozooplankton and their relation with the physicochemical parameters of the waters during low and high tides in Casiguran waters, Aurora, Northern Philippines were compared. A total of 105 species belonging to 10 major groups were identified. Copepoda constituted the major bulk of the mesozooplankton community with Corycaeus andrewsii, C. affinis, Oithona similis, Clausocalanus arcuicornis, Acrocalanus gracilis, Centropages furcatus and Canthocalanus pauper being the most abundant and widely distributed copepods in the said area during the two tidal phases. Using several diversity indices, high diversity in the mesozooplankton taxa was observed, but no differences were seen between the sampling stations and between the two tidal phases. Likewise, the results of NPMANOVA revealed no significant differences (p > 0.05) in mesozooplankton relative abundance between and within sampling stations between and during low and high tides. The results may imply that the level of mesozooplankton diversity and abundance did not fluctuate with changes in the tide levels and that mesozooplankton taxa were thus uniformly distributed in the waters of Casiguran Sound and Bay. Results of Canonical Correspondence Analysis revealed pH, dissolved oxygen and water temperature in influencing the mesozooplankton composition and abundance; however other factors (i.e. diverse feeding habits, vertical migration, predators) may also be important in shaping the community structure of mesozooplankton. Considering the importance of copepods as major component of the marine zooplankton and its function in marine food webs, the present records are therefore crucial in understanding the dynamics of marine ecosystems and are necessary for purposes of management and conservation of marine resources.

3 citations


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01 Jan 1999
TL;DR: In this article, a minimum in phytoplankton abundance, biomass and diversity was observed in the inner to upper reaches of all estuaries, suggesting massive mortality in these zones.
Abstract: In spring 1993 phytoplankton samples were taken along the longitudinal salinity gradient of the estuaries of the Elbe, Schelde and Gironde. A minimum in phytoplankton abundance, biomass and diversity was observed in the inner to upper reaches of all estuaries, suggesting massive mortality in these zones. Due to a combination of high turbidity and high river runoff, phytoplankton of the Gironde estuary differed in species composition and had lower cell abundancies and biomass compared with Elbe and Schelde. Phytoplankton structure and biomass of the polyhaline reaches of the Elbe and Schelde were quite comparable. They were characterized by the diatoms Skeletonema costatum and several Thalassiosira spp. and most probably developed in situ. The presence of tychoplanktonic species in these reaches indicates exchange with the intertidal flats. On the other hand, some marked differences were observed in the upper and tidal freshwater reaches of these two estuaries. In the oligohaline Schelde stations, phytoplankton populations were dominated by the diatom Cyclotella meneghiniana. The diatom Stephanodiscus hantzschii was dominant in the limnetic stations of the Elbe estuary. Despite the unfavourable light climate, the presence of the halophilous diatom C. meneghiniana in the Schelde estuary might indicate in situ development of phytoplankton populations. This could be attributed to the high residence time and the absence of grazers due to oxygen stress. In the Elbe, river runoff is too high (at least in spring) to permit in situ development of phytoplankton in the upper and freshwater tidal reaches.

9 citations

Journal ArticleDOI
TL;DR: In this article, a 16-year phytoplankton data was analyzed to assess ENSO and anthropogenic impacts on biodiversity and community structure at 3 locations (Nha-Trang and Phan-Thiet Bays and near Phu-Qui Island) in South Centre Viet Nam to understand the primary scales of change in phyto-ankton community structure, and traditional and taxonomic diversity indices; the significance of environmental changes and/or climate variability on phytotankton diversity; and the usefulness of these long-term data for

6 citations

Journal Article
TL;DR: The composition, abundance, distribution, diversity and seasonal variation of marine zooplankton of Buguma Creek were investigated between November 2004 and October 2006 at five stations, to assess the influence of environmental factors.
Abstract: The composition, abundance, distribution, diversity and seasonal variation of marine zooplankton of Buguma Creek were investigated between November 2004 and October 2006 at five stations, to assess the influence of environmental factors. Thirty-seven taxa comprising 6554 individuals were recorded during the study. Station 3 had the largest number of taxa (22) and individuals (3837) whereas station 4 had the lowest number (14 and 358, respectively). Arthropods were the most important at all the stations, contributing >95% to the total fauna. The rest of the fauna belonged to Coelenterata, Ctenophora, Annelida, Chaetognatha and Chordata. Hutcheson’s t-test showed that stations 4 and 5 had significantly higher diversity (P 0.05). High densities of copepod and decapod crustaceans at station 3 could be attributed to increased nutrients resulting from domestic wastes dump and decay of mangrove leaves from regular cutting of mangrove. Some environmental factors which affected the distribution of zooplankton were dissolved oxygen, water level, pH, alkalinity and EDTA hardness.

5 citations

01 Jan 2015
TL;DR: In this article, the authors compared the composition, diversity, abundance of mesozooplankton and their relation with the hydrological conditions of the waters in Baler Bay, Aurora, Northern Philippines.
Abstract: Composition, diversity, abundance of mesozooplankton and their relation with the hydrological conditions of the waters in Baler Bay, Aurora, Northern Philippines were compared. A total of 122 taxa belonging to 9 major groups were categorized. Copepoda comprises the chief constituent of the mesozooplankton community with Canthocalanus pauper, Oncaea venusta, Centropages furcatus, Acrocalanus gibber, Calanopia elliptica and Candacia catula being the most abundant and widely distributed copepods in the said area. Using several diversity indices, high diversity and evenness but low dominance values in the mesozooplankton taxa was observed in the five sampling stations. Results of Kruskal-Walis Test revealed significant differences (p<0.05) in the mesozooplankton relative abundance between the sampling stations. Further, results of Canonical Correspondence Analysis revealed total suspended solids (TSS) in influencing the mesozooplankton abundance. In view of the role of copepods as key contributors of the marine zooplankton and their position in the marine food webs, the present findings are therefore important in understanding the dynamics of any marine ecosystems and are vital in terms of managing and conserving the marine resources.

4 citations