Revealing the distinct habitat ranges and hybrid zone of genetic sub-populations within Pseudo-nitzschia pungens (Bacillariophyceae) in the West Pacific area
Autor: | Shailesh Kumar Patidar, Myung-Soo Han, Pengbin Wang, Bum Soo Park, Joo-Hwan Kim, Jin Ho Kim |
---|---|
Rok vydání: | 2018 |
Předmět: |
0106 biological sciences
Genotype media_common.quotation_subject Population Plant Science Aquatic Science 010603 evolutionary biology 01 natural sciences Hybrid zone education Clade Ecosystem Phylogeny Demography media_common Diatoms education.field_of_study Pacific Ocean biology Ecotype Ecology 010604 marine biology & hydrobiology DNA biology.organism_classification Speciation Diatom Habitat Hybridization Genetic Pseudo-nitzschia |
Zdroj: | Harmful Algae. 73:72-83 |
ISSN: | 1568-9883 |
Popis: | Genetic sub-populations (clades) of cosmopolitan marine diatom Pseudo-nitzschia pungens might have distinct habitats, and their hybrid zone is suspected in higher latitude area of the West Pacific area, however, it is still unrevealed because of technical difficulties and lack of evidences in natural environments. The aim of this study is to investigate the habitat characteristics of each clade of P. pungens on geographical distribution with the habitat temperature ranges of each clade and to reveal their hybrid zone in the West Pacific area. We employed the 137 number of nucleotide sequences of P. pungens and its sampling data (spatial and temporal scale) originated from the West Pacific area, and used field application of qPCR assay for intra-specific level of P. pungens. Only two genotypes, clade I and III, were identified in the West Pacific area. Clade I was distributed from 39 to 32.3°N, and clade III were from 1.4 to 34.4°N. The estimated habitat temperature for the clade I and clade III ranges were 8.1–26.9 °C and 24.2–31.2 °C, respectively. The latitudinal distributions and temperature ranges of each clade were significantly different. The qPCR assay employed, and results suggested that the hybrid zone for clade I and III has been observed in the southern Korean coasts, and clade III might be introduced from the Southern Pacific area. The cell abundances of clade III were strongly related with the higher seawater temperature and warm current force. This study has defined distinct habitat characteristics of genetically different sub-populations of P. pungens, and revealed its hybrid zone in natural environment for the first time. We also provided strong evidences about dispersion of the population of clade III to higher latitude in the West Pacific area. |
Databáze: | OpenAIRE |
Externí odkaz: |