Long-term vegetation changes on the stabilized dunes of Do�ana National Park (SW Spain)

Corona, Manuel Granados; Vicente, Ángel Martín; Novo, Francisco García

doi:10.1007/bf00044628

Cited by 62 publications

(12 citation statements)

References 7 publications

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“…(Minckley et al ., ). The coastal ecosystems at PRC during the previous and current interglacial may have been similar to those of modern‐day Doñana National Park in southwestern Spain, which is composed of a series of transgressive coastal dunes, back‐barrier lagoons, and peat bogs dominated by heath vegetation, scrubland, and pine and cork oak forests (Corona et al ., ; Muñoz‐Reinoso, ; Sousa et al ., ). In particular, the Doñana peat bogs known as ‘Rivatehilos' are characterized by the presence of Erica ciliaris wet heathland and other vegetation, including various Sphagnum mosses, which are more typically found in the north‐western Iberian margin (Sousa et al ., ).…”

Section: Discussionmentioning

confidence: 99%

Mid‐Holocene Iberian hydroclimate variability and paleoenvironmental change: molecular and isotopic insights from Praia Rei Cortiço, Portugal

Taylor

Benedetti

Haws

et al. 2017

J Quaternary Science

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At Praia Rei CortiS co (PRC), coastal Portugal, we analyzed compound-specific isotopes of plant wax-derived n-alkanes in combination with molecular distribution proxies and C/N ratios to reconstruct hydrologic and environmental change in a mid-Holocene wetland. During this relatively brief segment of the Holocene (6.6-5.4k cal a BP), substantial shifts in the stable hydrogen isotope composition of terrestrially sourced C 29 n-alkanes (dD n-C29 ) record significant multi-decadal changes in precipitation origin and storm trajectory. Wetland formation at PRC occurred during a humid interval (6.6-6.5k cal a BP) with a dominantly tropical precipitation source, likely the result of a persistent negative phase of the North Atlantic Oscillation, which permitted the establishment and dominance of Sphagnum moss. A subsequent decrease in precipitation significantly reduced Sphagnum abundance at PRC, which is evidenced by decreased sedimentary C/N ratios and reduced mid-chain n-alkane abundances. From 5.9 to 5.4k cal a BP, relatively low dD n-C29 values coincide with sand invasion along the Iberian coast and cooling in the North Atlantic. Strong correspondence between dD n-C29 values and the occurrence of ice-rafted debris recorded in deep sea sediment cores during this period illustrate a marked North Atlantic control on the trajectory of mid-latitude storms and precipitation regimes in Iberia.

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Section: Discussionmentioning

confidence: 99%

Mid‐Holocene Iberian hydroclimate variability and paleoenvironmental change: molecular and isotopic insights from Praia Rei Cortiço, Portugal

Taylor

Benedetti

Haws

et al. 2017

J Quaternary Science

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“…In the low-lying areas of Doñana, the former woodland type was composed of Q. suber. Lumbering, prescribed fires and overgrazing destroyed most of these woodlands which formerly dominated the Park vegetation (Granados et al 1988), and reduced them to small remnant thickets. Forest degradation has also resulted in destruction of the rich organic original soil and in impoverishment of the sandy soils (García Novo 1997).…”

Section: Discussionmentioning

confidence: 99%

Plant functional types and ecosystem function in Mediterranean shrubland

Barradas

Zunzunegui

Tirado

et al. 1999

J Vegetation Science

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Abstract. This study attempts to identify Plant Functional Types (PFTs) within the scrub vegetation of the stabilized sand dunes of the Doñana National Park (southwestern Spain) and to explore possible links with ecosystem function. Two 10‐km long transects were sampled along a gradient of water table depth from elevated and dry dunes to a border area close to the salt marsh. A matrix of cover values for 20 woody species × 58 plots and a matrix of 24 morphological and physiological traits × 20 species were analysed by means of DCA and TWINSPAN to identify the main vegetation types and PFTs. In order to know the predominant plant traits, the matrix of 20 species × 58 plots was multiplied by the 24 traits × 20 species matrix. The resulting 24 traits × 58 plots matrix was analysed by means of DCA. The main vegetation types coincide with the previous descriptions of the Park with Juniperus phoenicea woodland and xerophytic species dominating the top of the dunes and hygrophytic species with isolated Quercus suber trees in the depressions. Previous classifications of Mediterranean woody plants resulted in two main PFTs. The present analysis confirmed these two groups: maquis versus garrigue, but added four new groups. The analysis of the traits × plots matrix revealed that the main trend of variation is related to the water table gradient, while the traits related to the species of mature plant communities had little weight in the analysis because these communities are restricted to isolated patches.

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“…The density of reproductive individuals is greater in the Matasgordas population than in the Reserva (3.096 ± 0.396 and 0.089 ± 0.054 individuals/ha; Garrote et al, 2018). Populations of P. bourgaeana and other tree species (e.g., Quercus suber, Fraxinus angustifolia) have been decimated in the Doñana area due to a long history of human-related disturbances (e.g., land-use changes, timber exploitation, fires; Granados, Martín, & García Novo, 1988). Given that P. bourgaeana is endangered in the Doñana area and plays a critical role providing key food resources to diverse animal guilds (Arenas-Castro, 2012;Garrote et al, 2018;Zywiec, Delibes, & Fedriani, 2012), the recovery of the species is an important conservation target .…”

Section: Study System and Focal Speciesmentioning

confidence: 99%

Genetic rescue by distant trees mitigates qualitative pollen limitation imposed by fine‐scale spatial genetic structure

et al. 2019

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Restricted seed dispersal frequently leads to fine‐scale spatial genetic structure (i.e., FSGS) within plant populations. Depending on its spatial extent and the mobility of pollinators, this inflated kinship at the immediate neighbourhood can critically impoverish pollen quality. Despite the common occurrence of positive FSGS within plant populations, our knowledge regarding the role of long‐distance pollination preventing reproductive failure is still limited. Using microsatellite markers, we examined the existence of positive FSGS in two low‐density populations of the tree Pyrus bourgaeana. We also designed controlled crosses among trees differing in their kinship to investigate the effects of increased local kinship on plant reproduction. We used six pollination treatments and fully monitored fruit production, fruit and seed weight, proportion of mature seeds per fruit, and seed germination. Our results revealed positive FSGS in both study populations and lower fruit initiation in flowers pollinated with pollen from highly‐genetically related individuals within the neighbourhood, with this trend intensifying as the fruit development progressed. Besides, open‐pollinated flowers exhibited lower performance compared to those pollinated by distant pollen donors, suggesting intense qualitative pollen limitation in natural populations. We found positive fine‐scale spatial genetic structure is translated into impoverished pollen quality from nearby pollen donors which negatively impacts the reproductive success of trees in low‐density populations. Under this scenario of intrapopulation genetic rescue by distant pollen donors, the relevance of highly‐mobile pollinators for connecting spatially and genetically distant patches of trees may be crucial to safeguarding population recruitment.

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Long-term vegetation changes on the stabilized dunes of Do�ana National Park (SW Spain)

Cited by 62 publications

References 7 publications

Mid‐Holocene Iberian hydroclimate variability and paleoenvironmental change: molecular and isotopic insights from Praia Rei Cortiço, Portugal

Mid‐Holocene Iberian hydroclimate variability and paleoenvironmental change: molecular and isotopic insights from Praia Rei Cortiço, Portugal

Plant functional types and ecosystem function in Mediterranean shrubland

Genetic rescue by distant trees mitigates qualitative pollen limitation imposed by fine‐scale spatial genetic structure

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