AUTHOR=Gao Junfeng , Su Qiang 

TITLE=A comprehensive analysis of the relationship between temperature and species diversity: The case of planktonic foraminifera

JOURNAL=Frontiers in Marine Science

VOLUME=9

YEAR=2022

URL=https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2022.1069276

DOI=10.3389/fmars.2022.1069276

ISSN=2296-7745

ABSTRACT=<p>The relationship between temperature (<italic>T</italic>) and species diversity is one of the most fundamental issues in marine diversity. Although their relationships have been discussed for many years, how species diversity is related to <italic>T</italic> remains a controversial question. Previous studies have identified three <italic>T</italic>–diversity relationships: positive, negative, and unimodal. Recently, the unimodal relationship has received great attention. However, these studies may be biased by (1) considering the insufficient <italic>T</italic> range of database, (2) using a single diversity metric (generally species richness, <italic>S</italic>), and (3) rarely considering species abundance distribution (SAD) that can better represent diversity. Here, to seek a more comprehensive understanding of <italic>T</italic>–diversity relationships, their relationships are evaluated according to a global planktonic foraminifera dataset, which is usually considered as a model dataset for exploring diversity pattern. Species diversity are estimated by four most commonly used metrics and a new SAD parameter (<italic>p</italic>). Results show that <italic>S</italic> and Shannon’s index support the typical unimodal relationship with <italic>T</italic>. However, evenness and dominance do not have significant unimodality. Additionally, this study conjectures that the SAD parameter <italic>p</italic> with increasing <italic>T</italic> will gradually approach the minimum 1, noting that SAD (<italic>N<sub>r</sub></italic>/<italic>N</italic><sub>1</sub>, where <italic>N<sub>r</sub></italic> and <italic>N</italic><sub>1</sub> are the abundance of the <italic>r</italic>th and the first species in descending order) tends to be 1:1/2:1/3…. This study suggests that the <italic>T</italic>–diversity relationship cannot be wholly reflected by <italic>S</italic> and the other aspects of diversity (especially SAD) should be considered.</p>