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Flora Endemism on Gypsum Outcrops of the Sierra Madre Oriental of Southern Nuevo Leon, Mexico. Margarita Barba, Miguel A. González, A. Eduardo Estrada,

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Presentation on theme: "Flora Endemism on Gypsum Outcrops of the Sierra Madre Oriental of Southern Nuevo Leon, Mexico. Margarita Barba, Miguel A. González, A. Eduardo Estrada,"— Presentation transcript:

1 Flora Endemism on Gypsum Outcrops of the Sierra Madre Oriental of Southern Nuevo Leon, Mexico. Margarita Barba, Miguel A. González, A. Eduardo Estrada, George S. Hinton & José A. Villarreal Geo. B Hinton Herbarium Faculty of Forestry Sciences, CFNL Herbarium Autonomous University of Nuevo León

2 Introduction 283 vascular endemic genera in Mexico 12% of the estimated total of 2,410 in world

3 60% of endemism in arid and semi-arid area

4 Northeastern México In Sierra Madre Oriental (SMO), occurs hundreds of endemic species.

5 Gypsum outcrops = High endemism

6 Im charismatic, People protect My home

7 Yummy, endangered herbs and succulents

8 Are the gypsic ecosystems the richest endemic species in Nuevo Leon?

9 Coarse delimitation with Landsat Images. Refined it Orthophoto Web Service

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14 Frequency distributions of elevation, slope, aspect, topoform, temperature, rainfall, climate, vegetation and NDVI. The major part of the gypsum occurs on dry ecosystems

15 In the arid-warm climates is where the most part of gypsum occurs Mainly the gypsum is located in areas where temperature averages between 18-20° C

16 Around the half has a Complex Sierra with Hills landform, Mostly the gypsum ocurrs in places where the slope is between 0-30°

17 The most part of the gypsum outcrops is southern facing, and also to west. A 62% is located between 1700 and 2200 m

18 More than the half of gypsum area is dominated by Pinus arizonica woods 91% of the gypsum, show a NDVI below 0.15

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21 We checked GBH, TEX and CFNL herbaria And others in process

22 Number of endemic species for state Growing on gypsum Restricted to gypsum

23 We plan to finish the fieldwork next month

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26 The Hintons made 1,622 collections on gypsum. We have visited 31 sites and collected 850 specimens. Propose Natural Protected Areas on gypsum

27 Inclusion on: Mexican Law CITES IUCN using at least 4 criteria: Overall distribution Current status of the habitat Biological intrinsic vulnerability Human impact to habitat

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