Species richness and cover along a 60-year chronosequence in old-fields of southeastern Spain

Bonet, Andreu; Pausas, Juli G.

doi:10.1023/b:vege.0000049106.96330.9c

Cited by 175 publications

(153 citation statements)

References 60 publications

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“…The lower sequestration rate of NS sites is probably attributable to the 20-year delay before natural succession establishment. Such delays have also been reported at higher and lower latitudes: 15-20 years in Latvia at ~57° N [34], 10-42 years in UK at ~54° N [35], and 20-55 years in the Mediterranean region at ~40° N [36,37]. The distance from the seed stand is probably not the main explanation, since wind dispersal of seeds can occur over much larger distances.…”

Section: Vegetationmentioning

confidence: 89%

White Spruce Plantations on Abandoned Agricultural Land: Are They More Effective as C Sinks than Natural Succession?

Tremblay

Ouimet

2013

Forests

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Abstract:The objective of this study was to compare organic carbon (C) accumulation in plantations (PL) and natural succession (NS) established on fallow lands along a 50-year chronosequence in the eastern mixed forest subzone of Quebec (Canada). Above-and below-ground woody biomass were estimated from vegetation measurement surveys, and litter and soil (0-50 cm depth) C from samplings. At the year of abandonment, total C content of both PL and NS sites averaged 100 ± 13 Mg C ha −1 . Over 50 years, total C content doubled on NS sites and tripled on PL sites (217.9 ± 28.7 vs. 285.7 ± 31.0 Mg ha −1 ) with respect to fallow land. On NS sites, the new C stocks accumulated entirely in the vegetation. On PL sites, C accumulated mostly in the vegetation and to a lesser extent in the litter, whereas it decreased by a third in the soil. As a result, the net C accumulation rate was 1.7 ± 0.7 Mg ha −1 yr −1 greater on PL sites than on NS sites over 50 years. By the 23rd year, PL sites became greater net C sinks than NS sites in the fallow lands of the study area, even with the loss of soil C.

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Section: Vegetationmentioning

confidence: 89%

White Spruce Plantations on Abandoned Agricultural Land: Are They More Effective as C Sinks than Natural Succession?

Tremblay

Ouimet

2013

Forests

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“…Every cycle that a patch of ground is cultivated, its fertility drops by 2 per cent. Fallowed land regains natural vegetation (and its ability to limit erosion) at the same rate of 2 per cent per year and regains fertility at the rate of 1 per cent per year (Bonet & Pausas 2004, 2007.…”

Section: (B) Agent-based Modellingmentioning

confidence: 99%

“…C -factor) is reduced by 4 per cent. Any cell that is not cultivated or grazed will regain land-cover-related erosion resistance (as if vegetation were regrowing) at a rate of 2 per cent per annual cycle-corresponding to Mediterranean vegetation succession rates measured in abandoned fields (Bonet & Pausas 2004, 2007.…”

Section: Modelling Human Land Use (A) Stochastic Modellingmentioning

confidence: 99%

Land use, water and Mediterranean landscapes: modelling long-term dynamics of complex socio-ecological systems

Barton

Ullah

Bergin

2010

Phil. Trans. R. Soc. A.

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The evolution of Mediterranean landscapes during the Holocene has been increasingly governed by the complex interactions of water and human land use. Different land-use practices change the amount of water flowing across the surface and infiltrating the soil, and change water's ability to move surface sediments. Conversely, water amplifies the impacts of human land use and extends the ecological footprint of human activities far beyond the borders of towns and fields. Advances in computational modelling offer new tools to study the complex feedbacks between land use, land cover, topography and surface water. The Mediterranean Landscape Dynamics project (MedLand) is building a modelling laboratory where experiments can be carried out on the long-term impacts of agropastoral land use, and whose results can be tested against the archaeological record. These computational experiments are providing new insights into the socio-ecological consequences of human decisions at varying temporal and spatial scales.

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“…Natural forest regeneration or passive restoration of Mediterranean abandoned agricultural land is usually slow due to a number of limiting factors (Maestre et al 2003;Bonet and Pausas 2004;Vallejo et al 2006;Rey Benayas et al 2008a). Key constraints on the speed of regeneration include (1) dispersal limitation because seed sources are remote and dispersal vectors may be rare (Rey Benayas et al 2008a;Pons and Pausas 2007a;Zamora et al 2010;Ramos-Palacios et al 2014); (2) seed predation Pérez-Ramos and Marañón 2008;Gómez and Hódar 2008;Leiva and Fernández 2003); (3) biotic limitation such as competition from established woody vegetation and herbaceous vegetation (Rey Benayas et al 2005;Cuesta et al 2010a), and herbivory Puerta et al 2012); and (4) abiotic limitation such as low water availability, extreme temperatures, poor soil structure and low nutrient availability (Rey Benayas 1998;Cuesta et al 2010b).…”

Section: Introductionmentioning

confidence: 99%

Predation and aridity slow down the spread of 21-year-old planted woodland islets in restored Mediterranean farmland

et al. 2015

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Planted woodland islets act as sources of seed that may accelerate woodland development in extensive agricultural landscapes. We assessed a 1-ha plot that was planted with 16 100-m 2 islets of holm oak Quercus ilex subsp. ballota seedlings near Toledo (Spain) in 1993. In spring 2014 we measured (1) acorn predation and (2) seedling emergence from seeded acorns at different distances from and orientations around the islets with half of the acorns protected to prevent predation, (3) survival of emerged seedlings, and (4) natural tree establishment outside of the planted islets. Most (96.9 %) unprotected acorns were removed or predated. Seedling emergence from protected acorns ranged from 42.9 % on the northern side of the islets to 13.2 % on the southern side, suggesting a less stressful microclimate on the northern side. Survival of naturally established seedlings was 28.6 % by the end of first summer; seedling mortality was chiefly due to drought (45.0 %) and herbivory (35.0 %). Density of emerged seedlings, surviving seedlings after first dry season, and established oaks [1-year old was similar at different distances from the islets. Over the 21 year time period, 58 new oak individuals [1-year old have established (an average of 3.3 established individuals per ha per year) at an average distance of 6.3 ± 5.4 m away from the closest islet. We conclude that initial oak regeneration triggered by small planted islets in Mediterranean abandoned farmland is slowed down by high acorn predation, seedling herbivory, and stressful microclimatic conditions. Regardless, these islets are a viable tool for regeneration of Mediterranean oak woodland.

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Species richness and cover along a 60-year chronosequence in old-fields of southeastern Spain

Cited by 175 publications

References 60 publications

White Spruce Plantations on Abandoned Agricultural Land: Are They More Effective as C Sinks than Natural Succession?

White Spruce Plantations on Abandoned Agricultural Land: Are They More Effective as C Sinks than Natural Succession?

Land use, water and Mediterranean landscapes: modelling long-term dynamics of complex socio-ecological systems

Predation and aridity slow down the spread of 21-year-old planted woodland islets in restored Mediterranean farmland

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