Germination in tamaulipan thornscrub of north-eastern Mexico |
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Authors: | Enrique Jurado Oscar Aguirre Joel Flores Jos Navar Horacio Villaln David Wester |
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Affiliation: | a Facultad de Ciencias Forestales, UANL AP 41 Linares, NL, 67700, Mexico;b Instituto de ecología AC AP 63, xalapa, Ver, 91000, Mexico;c Department of Range, Wildlife and Fisheries Management, Texas Tech University, Lubbock, TX, 79409-2125, U.S.A. |
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Abstract: | In semi-arid environments plants should be selected to germinate at times most suitable for seedling establishment. Germinability, rate of germination and temperature preference for germination (12 or 28°C constant) were analysed with respect to growth form (grass, forb, woody), longevity and seed size. Short-lived species showed preferential germination at either high or low temperature, whereas long-lived species tended to be indifferent to season. Germinability was >20% for 28 spp., 17 species were <10% and 21 species did not germinate under any circumstances. Growth form or life-span did not influence germination. Woody species germinated rapidly. Germinability and germination rate were positively associated. |
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Keywords: | matorral seed dormancy regeneration niche |
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