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Description of two new coexisting parasitoids of blooming dinoflagellates in the Baltic sea: Parvilucifera catillosa sp. nov. and Parvilucifera sp. (Perkinsea, Alveolata)
- Source :
- Digital.CSIC. Repositorio Institucional del CSIC, instname
- Publication Year :
- 2020
- Publisher :
- Elsevier, 2020.
-
Abstract
- 15 pages, 9 figures, 2 tables, supplementary materials https://doi.org/10.1016/j.hal.2020.101944<br />Perkinsea are a group of intracellular protist parasites that inhabit all types of aquatic environments and cause significant population declines of a wide variety of hosts. However, the diversity of this lineage is mostly represented by environmental rDNA sequences. Complete descriptions of Perkinsea that infect marine dinoflagellates have increased in recent literature due to the identification, isolation and culturing of representatives during bloom events, contributing to expand the knowledge on the diversity and ecology of the group. Shallow coastal areas in the Baltic Sea suffer seasonal dinoflagellate blooms. In summer 2016, two parasitoids were isolated during a Kryptoperidinium foliaceum bloom in the Baltic Sea. Morphological features and sequences of the small and large subunit of the ribosomal DNA gene revealed these two parasitoids were new species that belong to the genus Parvilucifera. This is the first time that Parvilucifera infections are reported in the Inner Baltic Sea. The first species, Parvilucifera sp. has some morphological and phylogenetic features in common with P. sinerae and P. corolla, although its ultrastructure could not be studied and the formal description could not be done. The second new species, named Parvilucifera catillosa, has several distinct morphological features in its zoospores (e.g. the presence of a rostrum), and in the shape and size of the apertures in the sporangium stage, which are larger and more protuberant than in the other species of the genus. Infections observed in the field and cross-infection experiments determined that the host range of both Parvilucifera species was restricted to dinoflagellates, each one showing a different host preference. The coexistence in the same environment by the two closely related parasitoids with very similar life cycles suggests that their niche separation is the preferred host<br />This study was supported by the Academy of Finland, grant 251564 to A.K. E. G and A.R. were supported by MINECO COPAS “Understanding top-down control in coastal bloom-forming protists” (CTM2017-86121-R). Phytoplankton cultures were provided by the culture collection of the Finnish Environment Institute (SYKE)<br />With the funding support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S), of the Spanish Research Agency (AEI)
- Subjects :
- 0106 biological sciences
HABs
Parvilucifera
Lineage (evolution)
Population
Zoology
Plant Science
010501 environmental sciences
Aquatic Science
medicine.disease_cause
DNA, Ribosomal
01 natural sciences
medicine
Animals
Perkinsea
14. Life underwater
education
Ribosomal DNA
Phylogeny
0105 earth and related environmental sciences
Life Cycle Stages
education.field_of_study
biology
010604 marine biology & hydrobiology
fungi
Dinoflagellate
Niche differentiation
Protist
biology.organism_classification
Parasite
Alveolata
Ultrastructure
Host range
Dinoflagellida
Specificity
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Digital.CSIC. Repositorio Institucional del CSIC, instname
- Accession number :
- edsair.doi.dedup.....b5e14be378ce3934e8d26c4fc30f0dee