Relationship among carnivorous macrophyte Utricularia foliosa L. and species composition and life forms of periphytic algae community

Abstract

Aim: Present study evaluated the life forms and taxonomic structure of the periphytic algae community on Utricularia foliosa L. (modified leaf and stem) and artificial substrate during the four seasons in a tropical shallow reservoir. Methods: We evaluated the periphyton on natural and artificial substrate in order to evaluate the influence of substrate type on the taxonomic structure of algal community. Monospecific stands of U. foliosa were selected. Water and periphyton sampling were performed within U. foliosa stands in the autumn (April/2010), winter (July/2010), spring (November/2010) and summer (February/2011). Nylon thread was used as the artificial substrate. The community structure was evaluated through life forms, species richness, diversity and species composition. Results: Species diversity was significantly different only among seasons. The life forms and species richness were different between substrate types and seasons. Entangled filamentous algae had higher biovolume in the periphyton on artificial substrate and unicellular flagellated algae had higher biovolume on natural substrate. Species composition changed among the seasons and species descriptors differed among substrates types. Species-level taxonomic classification responded clearly to the substrate type. Conclusions: We concluded that the taxonomic structure and life forms of periphytic algae on artificial substrate poorly represented the natural periphyton on U. foliosa. The type of substrate strongly influenced the periphyton-Utricularia relationship.

Physical structure of the environment contributes to the development of diversity of microalgal assemblages

“…Although architectural complexity of the cotton wool provided as great morphological habitat complexity to the systems as did the Utricularia , species and functional richness of metaphyton in Utricularia containing microcosms was higher than those in which cotton wool was placed. This result was not trivial, because authors of a previous study 52 found that filamentous algae had higher biovolume on artificial substrates than on submerged macrophytes. However, in our case, the results suggest that cotton wool has a more homogeneous structure than Utricularia vulgaris , with probably less habitat heterogeneity and fewer niches available.…”

Composición y estructura de la comunidad de algas perifíticas del río Alvarado y algunos tributarios (Tolima, Colombia)

“…Con relación a los sustratos evaluados, no se identificaron cambios en la estructura y la diversidad de la comunidad. Este comportamiento es similar a lo reportado por algunos estudios [51], [52], debido a la poca especificidad y selectividad que poseen las especies de algas fitoperifíticas frente a estos dos tipos de sustratos naturales.…”

Kerapatan Populasi Makrofita Berpengaruh Terhadap Kelimpahan Dan Keanekaragaman Mikroalga Epifiton Di Danau Tempe

“…Pemeriksaan mikroalga epifiton dilakukan di Laboratorium Pusat Penelitian Limnologi LIPI, Cibinong. Pemeriksaan secara kualitatif dilakukan dengan mengidentifikasi taxa alga epifiton menggunakan buku kunci identifikasi (Mizuno, 1979;Prescott, 1970). Analisis kuantitatif dilakukan dengan penghitungan secara langsung menggunakan alat Sedgewick rafter 1 mL dengan hasil dikonversi ke luas substrat epifiton (APHA, 2015).…”