Influence of sampling sufficiency on biodiversity analysis of microperiphyton communities for marine bioassessment

Abstract

These results suggest that sampling sizes represented a significant influence on biodiversity analysis of microperiphyton communities for monitoring programs and ecological conservation researches in marine ecosystems.

An approach to determining functional parameters of microperiphyton fauna in colonization surveys for marine bioassessment based on rarefaction curves

“…. ., and 19-20 glass slides at two depths Many investigations have demonstrated that the observed species richness of a community along with functional parameters are strongly influenced by sampling effort, and that rarefaction processes cannot negate the influence of sampling effort on γ-diversity (e.g., Clarke et al 2011;Xu et al 2011Xu et al , 2012a. In this study, the rarefied average species richness and functional parameters were weakly sensitive to sampling influence, i.e.,~8 glass slides were sufficient to achieve coefficients of variation of <5 % in functional parameters based on the average species richness.…”

Can dispersions be used for discriminating water quality status in coastal ecosystems? A case study on biofilm-dwelling microbial eukaryotes

“…Sample processing was conducted according to the methods described by Xu et al (2011Xu et al ( , 2012. Identifications were carried out following the references such as Song et al (2009) and Hasle and Syvertsen (1997).…”

“…Biofilm-dwelling microbial eukaryotes are the primary components of a biofilm or microperiphyton communities, and employ a vital role in the functioning of microbial food webs in aquatic ecosystems (Gold et al, 2002;Norf et al, 2009;Risse-Buhl and Küsel, 2009;Xu et al, 2012). Phototrophic microalgae (mainly benthic diatoms) devote the primary production (Xu et al, 2008;Debenest et al, 2009;Duong et al, 2010;Xu et al, 2012), whereas the heterotrophic protozoa act as variety of trophic-functional consumers, such as bacterivores, algivores, raptors and non-selectives, and transfer the flux of both elements and energy from picoand nano-plankton to benthos (Fischer et al, 2002;Kathol et al, 2009;Norf et al, 2009;Xu et al, 2011Xu et al, , 2014a.…”

“…Phototrophic microalgae (mainly benthic diatoms) devote the primary production (Xu et al, 2008;Debenest et al, 2009;Duong et al, 2010;Xu et al, 2012), whereas the heterotrophic protozoa act as variety of trophic-functional consumers, such as bacterivores, algivores, raptors and non-selectives, and transfer the flux of both elements and energy from picoand nano-plankton to benthos (Fischer et al, 2002;Kathol et al, 2009;Norf et al, 2009;Xu et al, 2011Xu et al, , 2014a. Both structural and functional variations in the microbial eukaryote communities may significantly influence the ecological equilibrium of the aquatic food web, especially the community structures of metazoa (Patterson et al, 1989;Norf et al, 2009;Xu et al, 2012Xu et al, , 2014a. Otherwise, microbial eukaryotes play an important function in maintaining and improving water quality due to their high tolerance to the extreme environmental conditions and inhabit biotopes compared to metazoa (Patterson et al, 1989;Coppellotti and Matarazzo, 2000;Xu et al, 2008).…”

“…Otherwise, microbial eukaryotes play an important function in maintaining and improving water quality due to their high tolerance to the extreme environmental conditions and inhabit biotopes compared to metazoa (Patterson et al, 1989;Coppellotti and Matarazzo, 2000;Xu et al, 2008). Furthermore, with their short generation times, sensitivity to environmental changes, they have widely been used as useful bioindicators of water quality in aquatic biotopes (Khatoon et al, 2007;Dorigo et al, 2009Dorigo et al, , 2010Morin et al, 2010;Xu et al, 2012Xu et al, , 2014aXu et al, , 2014bZhong et al, 2014).…”