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Publication Type J
Authors Ochoa-Hueso, R; Manrique, E
Author Full Name Ochoa-Hueso, Raul; Manrique, Esteban
Title Nitrogen fertilization and water supply affect germination and plant establishment of the soil seed bank present in a semi-arid Mediterranean scrubland
Source PLANT ECOLOGY
Language English
Document Type Article
Author Keywords Additive effects; Critical load; Mediterranean ecosystems; N fertilization; Rainfall; Seed bank
Keywords Plus SPECIES-DIVERSITY; CLIMATE-CHANGE; DEPOSITION; ECOSYSTEMS; VEGETATION; BIODIVERSITY; SEEDLINGS; DYNAMICS; PH; ACIDIFICATION
Abstract Anthropogenic nitrogen (N) inputs in terrestrial ecosystems are higher than those that occur naturally and have been related to global biodiversity loss and altered ecosystem functioning. However, its effects on Mediterranean-type ecosystems, where production is water-limited and N regulated, remain unclear. We conducted a green-house experiment where we evaluated the effects of four simulated scenarios of N pollution (0, 10, 20 and 50 kg N ha(-1) year(-1)) and two differential water supply regimes on the germination (experiment 1) and early plant establishment (experiment 2) of a seed bank from a semi-arid Mediterranean ecosystem of central Spain. Seed bank density was estimated as 62,374 +/- A 3,279 seeds m(-2). Approximately 99.5% of emerged seeds corresponded to only 14 species of a total of 52, the majority of which were the annual forb Sagina apetala. The responses for N treatments were species-specific, mainly positive or unimodal, with watering treatments having some interactive effects. N and water supply also affected total and specific productivity; the responses found for N treatments were mainly humpback-shaped and an increased water supply had additive effects on community establishment in terms of total plant biomass. This response was linked to forb responsiveness. Contrary to predictions, grass biomass did not change with N supply; however, grass to forb ratio was affected because of changes in the latter. Overall, these experiments suggest a critical load for plant biomass production and conclude that N and water availability and supply can modify germination and plant establishment. This should be taken into account when analysing the effects of global change on the dynamics of plant communities where annuals are dominant or vegetation must establish from seed following a natural or anthropogenic disturbance regime.
Author Address [Ochoa-Hueso, Raul; Manrique, Esteban] CCMA CSIC, Ctr Ciencias Medioambientales, Dept Plant Physiol & Ecol, Madrid 28006, Spain
Reprint Address Ochoa-Hueso, R (reprint author), CCMA CSIC, Ctr Ciencias Medioambientales, Dept Plant Physiol & Ecol, C Serrano 115 Bis, Madrid 28006, Spain.
E-mail Address raul.ochoa@ccma.csic.es
ResearcherID Number Ochoa-Hueso, Raul/Q-6578-2017; Ochoa-Hueso, Raul/K-1113-2016
ORCID Number Ochoa-Hueso, Raul/0000-0002-1839-6926; Ochoa-Hueso, Raul/0000-0002-1839-6926; Manrique, Esteban/0000-0002-6565-0704
Funding Agency and Grant Number Spanish Ministerio de Educacion y Ciencia [CGL-2009-11015, AGL-2006-13848-C02-01/AGR]; FPU fellowship [AP2006-04638]; Comunidad de Madrid [S-0505/AMB/0335, S-0505/AMB/00321]
Funding Text Spanish Ministerio de Educacion y Ciencia financially supported this research by projects (CGL-2009-11015 and AGL-2006-13848-C02-01/AGR) and a predoctoral FPU fellowship to ROH (AP2006-04638). Comunidad de Madrid also contributed to partially fund this work by REMEDINAL (S-0505/AMB/0335) and S-0505/AMB/00321 projects. We are indebted to Raquel Santamaria for helping during the green-house work, Dr. M. Esther Perez-Corona for critical reading and comments of an earlier version of the manuscript, Dr. Edith B. Allen and Heather Schneider for revision of the English and valuable scientific comments, and Dr. Scott Meiners and two anonymous referees for improving the manuscript. We are also indebted to Dr. Jose Javier Pueyo and Dr. Begona Peco for their unselfish involvement in the project.
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Cited Reference Count 59
Times Cited 20
Total Times Cited Count (WoS, BCI, and CSCD) 22
Publisher SPRINGER
Publisher City DORDRECHT
Publisher Address VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISSN 1385-0237
29-Character Source Abbreviation PLANT ECOL
ISO Source Abbreviation Plant Ecol.
Publication Date OCT
Year Published 2010
Volume 210
Issue 2
Beginning Page 263
Ending Page 273
Digital Object Identifier (DOI) 10.1007/s11258-010-9755-4
Subject Category 11
Document Delivery Number Plant Sciences; Ecology; Forestry
Unique Article Identifier Plant Sciences; Environmental Sciences & Ecology; Forestry
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