Areas of endemism in the Southwestern Atlantic Ocean based on the distribution of benthic hydroids (Cnidaria: Hydrozoa)

Author(s)

Miranda, Thais Pires ^[1] ; Nestor Genzano, Gabriel ^[2] ; Marques, Antonio Carlos ^{[3, 1]}

Affiliation

^[1] Univ Sao Paulo, Dept Zool, BR-05508090 Sao Paulo, SP - Brazil

^[2] CONICET UNMdP, IIMyC, Estn Costera Nagera, RA-7600 Mar Del Plata, Buenos Aires - Argentina

^[3] Univ Sao Paulo, Ctr Biol Marinha, Sao Sebastiao - Brazil

• Document type: Journal article
• Source: Zootaxa; v. 4033, n. 4, p. 484-506, OCT 27 2015.
• Web of Science Citations: 7

Abstract

Geographic distributions of 130 species of benthic hydroids were used to infer areas of endemism in the Southwestern Atlantic Ocean (SWAO, between 22 degrees S and 55 degrees S). Endemicity Analysis (EA) was carried out with the software NDM VNDM, using a 2 degrees x 2 degrees grid with different values of F (F = 0.5 and F = 1.0) for inferred presence. Hypothesized areas of endemism (16 with F = 0.5 and 13 with F = 1.0) formed three generalized patterns: (1) Tropical, (2) Subtropical, and (3) disjunctions along Tropical and Subtropical areas. Areas of endemism estimated here were compared with provinces, ecoregions and areas of endemism previously defined (but not based on algorithmic analysis) in the literature. Ecological and historical aspects that are potentially relevant for the SWAO realm were contrasted, related and discussed to areas of endemism. This is the first study to apply NDM VNDM to the marine realm and one of the few that focuses on the SWAO. (AU)

• FAPESP's process: 11/50242-5 - Dimensions of marine life: patterns and process of diversifications in planktonic and benthic cnidarians
• Grantee: Antonio Carlos Marques
• Support type: BIOTA-FAPESP Program - Thematic Grants
• FAPESP's process: 10/06927-0 - Biodiversity and areas of endemism of benthic hydroids (Cnidaria, Hydrozoa) from southern South America and Antarctica
• Grantee: Thaís Pires Miranda
• Support type: Scholarships in Brazil - Doctorate
• FAPESP's process: 13/50484-4 - Biodiversity and distribution patterns of the Medusozoa form the South-Western Atlantic
• Grantee: Antonio Carlos Marques
• Support type: Regular Research Grants
• FAPESP's process: 14/24407-5 - Benthic hydroids in sub Antarctic and Antarctic region endemism areas and their dispersion mechanisms influence on marine biogeographic patterns
• Grantee: Thaís Pires Miranda
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 04/09961-4 - Biodiversity, evolution, endemism and conservation of the Medusozoa from the Southwestern Atlantic
• Grantee: Antonio Carlos Marques
• Support type: Research Projects - Thematic Grants