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IDENTIFYING CONSERVATION PRIORITY AREAS IN THE MARAÑÓN VALLEY (PERU) BASED ON FLORISTIC INVENTORIES

Published online by Cambridge University Press:  24 November 2015

J. L. Marcelo-Peña ,
I. Huamantupa ,
T. Särkinen  and
M. Tomazello
J. L. Marcelo-Peña*
Affiliation:
Herbario Forestales (MOL), Manejo Forestal, Facultad de Ciencias Forestales, Universidad Nacional Agraria La Molina, Avenida La Universidad, Apartado 456, Lima 12, Peru. Departamento de Ciências Florestais, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Avenida Pádua Dias 11, CEP 13418-900, Caixa postal 09, Piracicaba, São Paulo, Brazil.
I. Huamantupa
Affiliation:
Herbario Vargas (CUZ), Facultad de Ciencias Biológicas, Universidad Nacional San Antonio Abad del Cusco, Apartado 367, Cusco, Peru. E-mail: andeanwaya@gmail.com
T. Särkinen
Affiliation:
Royal Botanic Garden Edinburgh, 20A Inverleith Row, Edinburgh EH3 5LR, UK.
M. Tomazello
Affiliation:
Departamento de Ciências Florestais, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Avenida Pádua Dias 11, CEP 13418-900, Caixa postal 09, Piracicaba, São Paulo, Brazil.
*
*E-mail for correspondence: jlmarcelop@lamolina.edu.pe
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Abstract

In this study, we report species diversity and endemism of the poorly known but highly diverse Seasonally Dry Tropical Forest (SDTF) flora of the Marañón valley in northern Peru. We characterise woody vascular plant species diversity across the valley in order to define the conservation value of the area at national and international level. Based on 32 rapid botanical inventories, 92 plots of 50 × 20 m, and a herbarium study across local and international herbaria, we report 440 woody vascular plant species of which 143 (33%) are endemic to the valley. Two centres of endemism within the valley are identified, each with clear elevational zonation of diversity. Data show that the Marañón valley is a good representative of Peruvian SDTFs as a whole, with an average of 56% SDTF species and 78% SDTF genera found in the one valley. The results show that there is wide variation in the set of dominant species across the valley, and that many local endemics are locally abundant unlike in neighbouring SDTFs where the dominant species are all geographically widespread. Our results demonstrate that the Marañón includes a rare combination of both nationally representative yet globally unique plant species, which makes the valley an ideal conservation target. The high level of endemism structured within elevational zones implies that conservation areas should be established across elevational zones in order to maximise the protection of this globally unique flora.

Keywords

Dry Andean valleysendemismfloristic inventoryHuancabamba depressionSeasonally Dry Tropical Forests (SDTFs)woody plant diversity
Type
Articles
Information
Edinburgh Journal of Botany , Volume 73 , Issue 1 , March 2016 , pp. 95 - 123
Copyright
Copyright © Trustees of the Royal Botanic Garden Edinburgh 2015 

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