Overlap of eastern and western mangroves in the South-western Pacific: hybridization of all three Rhizophora (Rhizophoraceae) combinations in New Caledonia

Duke, N.C. (2010) Overlap of eastern and western mangroves in the South-western Pacific: hybridization of all three Rhizophora (Rhizophoraceae) combinations in New Caledonia. Blumea, 55 (2). pp. 171-188.

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Abstract

A recent survey of mangroves in New Caledonia located 7 taxa of the genus Rhizophora - with 6 coexisting in one estuary. This is arguably the greatest concentration of co-occurring Rhizophora taxa anywhere. Two are well-known mangrove species of the Indo West Pacific, R. stylosa and R. apiculata, and another, R. samoensis resembles the widespread Atlantic East Pacific species, R. mangle. The other four are hybrid intermediates, R. x lamarckii (= R. stylosa x R. apiculata), R. x selala (= R. stylosa x R. samoensis), and two previously undescribed combinations, R. x tomlinsonii (R. apiculata x R. samoensis) and R. samoensis var. neocaledonica (= R. samoensis x R. x selala). The new entities are unknown elsewhere. While R. x tomlinsonii is considered endemic to New Caledonia, R. samoensis var. neocaledonica may occur elsewhere based on the co-distribution of putative parental taxa. All seven Rhizophora are described with new observations on their morphology and ecology, distribution maps, plus a revised key for the region.

Item ID: 30006
Item Type: Article (Research - C1)
ISSN: 2212-1676
Keywords: hybrids, New Caledonia, Rhizophora, Rhizophoraceae, South West Pacific, taxonomy
Funders: ZoNéCo (Programme d’évaluation des ressources marines de la zone économique de nouvelle-calédonie, Noumea)
Date Deposited: 30 Oct 2013 09:41
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity @ 10%
06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060310 Plant Systematics and Taxonomy @ 50%
06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060302 Biogeography and Phylogeography @ 40%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960802 Coastal and Estuarine Flora, Fauna and Biodiversity @ 40%
96 ENVIRONMENT > 9606 Environmental and Natural Resource Evaluation > 960609 Sustainability Indicators @ 20%
96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 40%
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