Leading up to the National Moth Week on July 22, we interview some contributors of moth observations.Listen to the first podcast episode with Nagesh O. S. on the IBP blog.

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2 documents found tagged foraminifera [X]
  • Title
    Mangrove sediment core analysis of foraminiferal assemblages - a study at two sites along the western coast of India
    Type
    Journal Article
    Description
    Mangroves are an unique habitat and are largely influenced by sea level changes and wave energy. Foraminifera (Protista) preserved in mangrove sediments provide an excellent proxy for deducing past conditions. One meter deep mangrove core samples at two sites on the western coast of India were collected. The foraminiferal assemblages at various depths showed significant changes in the abundance and diversity down the cores. A total of 59 species belonging to 32 genera, 24 families and five suborders were identified from the cores of these two sites. The cores showed an abundance of genus Rotalidium particularly the species Rotalidium annectans. Other species identified include Ammonia, Elphidium, Nonion, Spiroloculina, Quinqueloculina, Globigerinoides, etc. The pH, organic matter and CaCO3 also showed variations down the cores. There was a lack of correlation between sediment characteristics and the abundance of foraminifera in the cores. The low diversity and differences in distribution of foraminifera compared to surface intertidal samples may be due to intense post depositional changes or anthropogenic disturbances. The mangrove ecology thus appears disturbed by various factors.
    Attribution
    Vidya P., Patil R.K. (2014). Journal of Threatened Taxa 2(6) pp. 5485-5491; doi:10.11609/JoTT.o3653.5485-91
  • Title
    Intertidal Foraminifera of Indian coast - a scanning electron photomicrograph-illustrated catalogue
    Type
    Journal Article
    Description
    Foraminifera (forams) are very useful in deducing diverse environmental parameters such as palaeoclimate, oil deposits, oceanography, pollution monitoring and palaeomonsoons. Forams are calcareous, shell-secreting protists and are likely to be adversely affected due to anthropogenic ocean acidification caused by CO2 emission. Considering their significance and status, we have surveyed the occurrence of intertidal forams along the Indian Coast and Amini atoll of Lakshdweep Islands. Scanning electron microscopic observations have been carried out and are presented here. The foram assemblage is distinct from the tropical sites surveyed elsewhere while some of the species are common, suggesting that the local oceanographic conditions are major determinants in distribution of foram species. A total of 151 species of Foraminifera belonging to 65 genera, 41 families and 7 suborders were recorded in the present study. Only 4 species were planktonic and the rest were benthic. Rotalina and Miliolina were found to be dominant suborders. This paper contains SEM images of 142 identified species and surface details of some of species. The observations will serve the needs of researchers working with forams, especially in identification and morphological analysis.
    Attribution
    Devi G.S., Rajashekhar K.P. (2009). Journal of Threatened Taxa 1(1) pp. 17-36; doi:10.11609/JoTT.o1977.17-36