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Article ; Online: The importance of soil seed banks in ecological studies

Pablo Ferrandis

Revista Cubana de Ciencias Forestales, Vol 7, Iss 3, Pp 276-

2019 Volume 282

Keywords	Environmental sciences ; GE1-350 ; Ecology ; QH540-549.5
Language	English
Publishing date	2019-11-01T00:00:00Z
Publisher	Universidad de Pinar del Río "Hermanos Saíz Montes de Oca"
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Diverse phylogenetic neighborhoods enhance community resistance to drought in experimental assemblages

Rocío Chaves / Pablo Ferrandis / Adrián Escudero / Arantzazu L. Luzuriaga

Scientific Reports, Vol 11, Iss 1, Pp 1-

2021 Volume 12

Abstract: Abstract Although the role played by phylogeny in the assembly of plant communities remains as a priority to complete the theory of species coexistence, experimental evidence is lacking. It is still unclear to what extent phylogenetic diversity is a ... ...

Abstract	Abstract Although the role played by phylogeny in the assembly of plant communities remains as a priority to complete the theory of species coexistence, experimental evidence is lacking. It is still unclear to what extent phylogenetic diversity is a driver or a consequence of species assembly processes. We experimentally explored how phylogenetic diversity can drive the community level responses to drought conditions in annual plant communities. We manipulated the initial phylogenetic diversity of the assemblages and the water availability in a common garden experiment with two irrigation treatments: average natural rainfall and drought, formed with annual plant species of gypsum ecosystems of Central Spain. We recorded plant survival and the numbers of flowering and fruiting plants per species in each assemblage. GLMMs were performed for the proportion of surviving, flowering, fruiting plants per species and for total proportion of surviving species and plants per pot. In water limited conditions, high phylogenetic diversity favored species coexistence over time with higher plant survival and more flowering and fruiting plants per species and more species and plants surviving per pot. Our results agree with the existence of niche complementarity and the convergence of water economy strategies as major mechanisms for promoting species coexistence in plant assemblages in semiarid Mediterranean habitats. Our findings point to high phylogenetic diversity among neighboring plants as a plausible feature underpinning the coexistence of species, because the success of each species in terms of surviving and producing offspring in drought conditions was greater when the initial phylogenetic diversity was higher. Our study is a step forward to understand how phylogenetic relatedness is connected to the mechanisms determining the maintenance of biodiversity.
Keywords	Medicine ; R ; Science ; Q
Subject code	580 ; 590
Language	English
Publishing date	2021-11-01T00:00:00Z
Publisher	Nature Portfolio
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Factors involved in recruitment process of an endemic gypsophyte species in Spain

Pablo Ferrandis Gotor

Revista Cubana de Ciencias Forestales, Vol 1, Iss 1, Pp 1-

Teucrium libanitis

2013 Volume 11

Abstract: Gypsum soils in arid and semi-arid environments impose an important restriction of vascular plants. Factors controlling the recruitment of gypsophytes species are not completely understood. Recruitment is the combined result of processes involved in soil ...

Abstract	Gypsum soils in arid and semi-arid environments impose an important restriction of vascular plants. Factors controlling the recruitment of gypsophytes species are not completely understood. Recruitment is the combined result of processes involved in soil seed-bank dynamics and seedling establishment patterns. We examined the spatial and temporal patterns in the recruitment of Teucrium libanitis Schreb. (Labiatae), a gypsophyte endemic to the semi-arid south-eastern Iberian Peninsula, from the perspective of soil seed-bank dynamics. Seed production, soil seed bank, aerial seed bank, seed predation and seedling emergence and survival were monitored for one biological cycle. Different microhabitats were considered in the study to determine safe sites for T. libanitis recruitment. The gypsophyte T. libanitis forms a transient aerial seed bank and a persistent soil seed bank in gypsum steppe with a strategy well-adapted to semi-arid environments. The existence of this persistent soil seed bank supports the theory that the recruitment is produced by the occurrence of favourable climatic events. Seeds were redistributed horizontally, accumulating under plant cover, but seedling survival was not dependent on these different microhabitats. Recruitment was not limited by predation or by seed death by aging and pathogen attack.
Keywords	Estepas yesosas ; dinámica del banco de semillas ; supervivencia de plántulas ; predación de semillas ; parches de vegetación ; Environmental sciences ; GE1-350 ; Ecology ; QH540-549.5
Language	English
Publishing date	2013-06-01T00:00:00Z
Publisher	Universidad de Pinar del Río "Hermanos Saíz Montes de Oca"
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Optimization of Plant Production by Seed Treatment in Two Wild Subspecies of Narcissus pseudonarcissus Rich in Alkaloids

Raquel Herranz / Miguel A. Copete / José M. Herranz / Elena Copete / Pablo Ferrandis

Molecules, Vol 25, Iss 4439, p

2020 Volume 4439

Abstract: The daffodil Narcissus pseudonarcissus L. contains alkaloids of pharmaceutical interest. Wild daffodil populations have diverse genetic backgrounds and various genetic traits of possible importance. Developing protocols for plant production from seeds ... ...

Abstract	The daffodil Narcissus pseudonarcissus L. contains alkaloids of pharmaceutical interest. Wild daffodil populations have diverse genetic backgrounds and various genetic traits of possible importance. Developing protocols for plant production from seeds may ensure the availability of a large reservoir of individuals as well as being important for species with bulbs that are difficult to acquire. The closely related Narcissus pseudonarcissus subsp. munozii-garmendiae and subsp. nevadensis were investigated in this study because the alkaloids isolated from both are of high pharmacological interest. At the dispersal time, the seeds of both were dormant with underdeveloped embryos, i.e., morphophysiological dormancy (MPD). Experiments were conducted outdoors and under controlled laboratory conditions. Embryo growth and the percentages of radicle and seedling emergence were calculated under different temperature–light stratifications. In N. munozii-garmendiae , embryo growth occurred during warm stratification (28/14 °C or 25/10 °C) and the radicle then emerged when the temperature decreased, but the shoot was dormant. In N. nevadensis , the seeds germinated when cold stratified (5 °C) and then incubated at cool temperatures. Thus, N. munozii-garmendiae and N. nevadensis exhibit different levels of MPD, i.e., deep simple epicotyl and intermediate complex, respectively. Plant production protocols from seeds were established for both taxa in this study.
Keywords	alkaloid ; Amaryllidaceae ; deep simple epicotyl morphophysiological dormancy ; dormancy breakage ; embryo growth ; germination ; Organic chemistry ; QD241-441
Subject code	580
Language	English
Publishing date	2020-09-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Germination ecology of the endemic Iberian daffodil Narcissus radinganorum (Amaryllidaceae). Dormancy induction by cold stratification or desiccation in late stages of embryo growth

José María Herranz / Elena Copete / Miguel Ángel Copete / Pablo Ferrandis

Forest Systems, Vol 24, Iss 01, p e

2015 Volume 013

Abstract: Aim of study: We studied the germination ecology of a threatened daffodil in order to develop a protocol to produce plants ex-situ from seeds, a key tool for population reinforcement. Area of study: Experiments were carried out both outdoors and in the ... ...

Abstract	Aim of study: We studied the germination ecology of a threatened daffodil in order to develop a protocol to produce plants ex-situ from seeds, a key tool for population reinforcement. Area of study: Experiments were carried out both outdoors and in the laboratory in Albacete (Spain). Material and methods: Embryo length, radicle and shoot emergence were analyzed to determine the level of morphophysiological dormancy (MPD). Effects on germination of cold stratification or desiccation in late stages of embryo growth were also studied. Main results: Mean embryo length in fresh seeds was 1.36 mm, needing to grow up to 2.20 mm to be able to germinate. In the laboratory, embryo growth occurred during warm stratification (28/14, 25/10 ºC), and then radicle emerged when temperatures went down (15/4 ºC in darkness). Phenology study in outdoors conditions revealed that embryo grew during summer-early autumn, short time after seed dispersal in nature (i.e., May); radicle emerged in autumn. The shoot however did not emerge until late winter-early spring, because it was physiologically dormant and required a cold (5 ºC) period of 30 days to break dormancy. Early cold temperatures interrupted the embryo growth and induced dormancy in seeds whose embryo had grown 30% with respect to the initial length. Desiccation in seeds whose embryo had grown 30% did not induce dormancy, but did it when the embryo growth reached 70%. Research highlights: Seeds of Narcissus radinganorum have deep simple epicotyl MPD.
Keywords	dormancy break ; radicle emergence ; shoot emergence ; epicotyl MPD ; phenology ; secondary dormancy ; Agriculture ; S ; Forestry ; SD1-669.5
Subject code	580
Publishing date	2015-04-01T00:00:00Z
Publisher	Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Germination and soil seed bank traits of Podocarpus angustifolius (Podocarpaceae)

Pablo Ferrandis / Marta Bonilla / Licet del Carmen Osorio

Revista de Biología Tropical, Vol 59, Iss 3, Pp 1061-

an endemic tree species from Cuban rain forests

2011 Volume 1069

Abstract: Podocarpus angustifolius is an endangered recalcitrant-seeded small tree, endemic to mountain rain forests in the central and Pinar del Río regions in Cuba. In this study, the germination patterns of P. angustifolius seeds were evaluated and the nature ... ...

Abstract	Podocarpus angustifolius is an endangered recalcitrant-seeded small tree, endemic to mountain rain forests in the central and Pinar del Río regions in Cuba. In this study, the germination patterns of P. angustifolius seeds were evaluated and the nature of the soil seed bank was determined. Using a weighted two-factor design, we analyzed the combined germination response to seed source (i.e. freshly matured seeds directly collected from trees versus seeds extracted from soil samples) and pretreatment (i.e. seed water-immersion for 48h at room temperature). Germination was delayed for four weeks (≈30 days) in all cases, regardless of both factors analyzed. Moreover, nine additional days were necessary to achieve high germination values (in the case of fresh, pretreated seeds). These results overall may indicate the existence of a non-deep simple morphophysiological dormancy in P. angustifolius seeds. The water-immersion significantly enhanced seed germination, probably as a result of the hydration of recalcitrant seeds. Although germination of seeds extracted from soil samples was low, probably due to aging and pathogen effects throughout the time of burial, the study revealed the existence of a persistent soil seed bank (at least short-termed) of ≈42 viable seeds per m² in the upper 10cm of soil. Such a record is noteworthy since references to persistent soil seed banks in recalcitrant-seeded species are scarce in the literature. The population consequences derived from the formation of persistent soil seed banks in this endangered species are discussed. Rev. Biol. Trop. 59 (3): 1061-1069. Epub 2011 September 01. Podocarpus angustifolius es un árbol endémico de los bosques lluviosos de la región de Pinar del Río y la parte central de Cuba, que se encuentra en peligro de extinción. En este estudio se evaluó la germinación de sus semillas y la naturaleza del banco de semillas del suelo. Específicamente, se analizó la respuesta germinativa de las semillas a dos factores: su procedencia (recolectadas directamente de los árboles versus extraídas de muestras de suelo) y el pretratamiento (inmersión en agua durante 48h a temperatura ambiente). La germinación no comenzó hasta las cuatro semanas (≈30 días) en todos los casos. Además, fueron necesarios 9 días más para alcanzar un valor elevado de germinación (en el caso de semillas recolectadas del árbol con pretratamiento), lo que parece indicar la existencia de un letargo de tipo morfofisiológico simple no profundo. El pretratamiento incrementó significativamente la germinación, posiblemente por hidratación de las semillas recalcitrantes. El estudio demostró la existencia de un banco de semillas persistente en el suelo, al menos de corta duración de ≈42 semillas viables por m² en los 10 primeros cm del suelo. Dicho hallazgo es destacable, ya que los casos descritos en la literatura sobre bancos persistentes en especies con semillas recalcitrantes son escasos. Además, se discute la importancia que tiene para esta especie amenazada la existencia de un banco de semillas persistente.
Keywords	planta en peligro de extinción ; letargo morfofisiológico ; banco de semillas del suelo persistente ; tratamiento pregerminativo ; semillas recalcitrantes ; endangered plant species ; morphophysiological seed dormancy ; persistent soil seed bank ; pregerminative treatment ; recalcitrant seeds ; Biology (General) ; QH301-705.5
Language	English
Publishing date	2011-09-01T00:00:00Z
Publisher	Vicerractoría Investigación
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Post-Fire Recovery of Vegetation and Diversity Patterns in Semiarid Pinus halepensis Mill. Habitats after Salvage Logging

Daniel Moya / Javier Sagra / Manuel Esteban Lucas-Borja / Pedro Antonio Plaza-Álvarez / Javier González-Romero / Jorge De Las Heras / Pablo Ferrandis

Forests, Vol 11, Iss 1345, p

2020 Volume 1345

Abstract: After wildfires, emergency actions and post-fire management are implemented to mitigate fire damage. Salvage logging is a tool often applied to burned stands, but despite being a post-fire forest management tool to restore ecosystem functions, its ... ...

Abstract	After wildfires, emergency actions and post-fire management are implemented to mitigate fire damage. Salvage logging is a tool often applied to burned stands, but despite being a post-fire forest management tool to restore ecosystem functions, its ecological effects remain poorly understood. In the Mediterranean Basin, where land use and land-use change are bringing about changes in drought periods and fire regimes, optimal treatments should be included in adaptive management in order to increase resilience and reduce vulnerability. In July 2012, a mid- to high-burn severity fire burned almost 7000 ha of an Aleppo pine forest ( Pinus halepensis Mill.) in southeastern Spain. Five years later (late spring 2017), we designed an experimental study to monitor four stand categories on a burn severity basis (unburned mature stands, low-burn severity stands, and high-burn severity stands) and a salvage logging operation carried out 6 months after the fire in high-burn severity areas. We set 60 circular plots (15 in each treatment scenario) and 180 linear transects (3 per plot, 45 per scenario) to check the ecological facilitation of pine trees and snags (canopy size and/or perch effect). We estimated plant alpha diversity (floristic richness, abundance and dominance indices) and post-fire plant recovery (pine recruitment and adaptive traits). Fire depleted the system’s diversity, but in low-severity burning areas some basic functions remained intact (e.g., soil protection). We found that high-burn severity very negatively impacted ecosystem functions through the removal of duff and litter leaving unprotected soil. Collecting wood reduced pine regeneration and growth, which was considerable in the areas that suffered high-burn severity. The burned snags did not appear to act as perches resulting in seed dispersal. Obligate seeders were determined to be an efficient strategy for facing high-severity fires, whereas resprouters response showed no clear burn severity pattern despite being present in all the scenarios. ...
Keywords	pine recruitment ; wildfire recovery ; post-fire management ; pine saplings ; alpha diversity ; Plant ecology ; QK900-989
Subject code	550
Language	English
Publishing date	2020-12-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Germination and soil seed bank traits of Podocarpus angustifolius (Podocarpaceae)

Pablo Ferrandis / Marta Bonilla / Licet del Carmen Osorio

Revista de Biología Tropical, Vol 59, Iss 3, Pp 1061-

an endemic tree species from Cuban rain forests

2011 Volume 1069

Abstract	Podocarpus angustifolius is an endangered recalcitrant-seeded small tree, endemic to mountain rain forests in the central and Pinar del Río regions in Cuba. In this study, the germination patterns of P. angustifolius seeds were evaluated and the nature of the soil seed bank was determined. Using a weighted two-factor design, we analyzed the combined germination response to seed source (i.e. freshly matured seeds directly collected from trees versus seeds extracted from soil samples) and pretreatment (i.e. seed water-immersion for 48h at room temperature). Germination was delayed for four weeks (≈30 days) in all cases, regardless of both factors analyzed. Moreover, nine additional days were necessary to achieve high germination values (in the case of fresh, pretreated seeds). These results overall may indicate the existence of a non-deep simple morphophysiological dormancy in P. angustifolius seeds. The water-immersion significantly enhanced seed germination, probably as a result of the hydration of recalcitrant seeds. Although germination of seeds extracted from soil samples was low, probably due to aging and pathogen effects throughout the time of burial, the study revealed the existence of a persistent soil seed bank (at least short-termed) of ≈42 viable seeds per m² in the upper 10cm of soil. Such a record is noteworthy since references to persistent soil seed banks in recalcitrant-seeded species are scarce in the literature. The population consequences derived from the formation of persistent soil seed banks in this endangered species are discussed. Rev. Biol. Trop. 59 (3): 1061-1069. Epub 2011 September 01.
Keywords	planta en peligro de extinción ; letargo morfofisiológico ; banco de semillas del suelo persistente ; tratamiento pregerminativo ; semillas recalcitrantes ; Biology (General) ; QH301-705.5
Language	English
Publishing date	2011-09-01T00:00:00Z
Publisher	Vicerractoría Investigación
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Influential factors and processes in post-fire spatial changes of soil seed banks structure in Mediterranean saline steppe

Pablo Ferrandis / Álvaro Sánchez Virosta / José María Herranz / Esmeralda Martínez Duro

Revista Cubana de Ciencias Forestales, Vol 3, Iss 1, Pp 31-

2015 Volume 44

Abstract: Mediterranean saline steppes hold plant communities adapted to saline soils and severe droughts, with a spatial structure tipycal of semi-arid environments: vegetation is distributed in multi-specific patches on a large bare-soil matrix. Such a structure ...

Abstract	Mediterranean saline steppes hold plant communities adapted to saline soils and severe droughts, with a spatial structure tipycal of semi-arid environments: vegetation is distributed in multi-specific patches on a large bare-soil matrix. Such a structure exerts a strong effect on spatio-temporal patterns of the soil seed bank, which tends to accumulate under plant patches. In this study, we evaluated the recover ability of soil seed banks and possible changes in their spatial patterns during the earliest post-fire phases in a saline steppe, when the extant vegetation was temporally removed in the habitat. The study was carried out in El Saladar de Cordovilla (Tobarra, Albacete) after a fire in the late summer of 2011. To do this we proceeded to track and collect soil samples during the subsequent year and a half to fire. The seed in samples were identified and the results were subjected to various statistical analyses. The results showed that 18 months were not enough to recovery the original composition of soil seed bank in continental saline steppes, because after a fire the plant patches structure disappear temporarily, at least from original places, so their effect on spatial patterns of soil seed bank distribution are temporarily deleted.
Keywords	parches de vegetación ; microhábitats ; sucesión secundaria ; Environmental sciences ; GE1-350 ; Ecology ; QH540-549.5
Language	English
Publishing date	2015-06-01T00:00:00Z
Publisher	Universidad de Pinar del Río "Hermanos Saíz Montes de Oca"
Document type	Article ; Online
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Article ; Online: Post-Fire Seedling Recruitment and Morpho-Ecophysiological Responses to Induced Drought and Salvage Logging in Pinus halepensis Mill. Stands

Daniel Moya / Jorge de las Heras / Francisco R. López-Serrano / Pablo Ferrandis

Forests, Vol 6, Iss 6, Pp 1858-

2015 Volume 1877

Abstract: Salvage logging is the commonest post-fire emergency action, but has unclear ecological effects. In the Mediterranean Basin, drought periods and fire regimes are changing and forest management should be adapted. In summer 2009, a mid-high severity fire ... ...

Abstract	Salvage logging is the commonest post-fire emergency action, but has unclear ecological effects. In the Mediterranean Basin, drought periods and fire regimes are changing and forest management should be adapted. In summer 2009, a mid-high severity fire burned 968 ha of Aleppo pine (Pinus halepensis Mill.) forest in southeast Spain, which was submitted to salvage logging six months later. In spring 2010, plots were set in untreated and logged areas to monitor the recruitment and survival of the main tree species and three companion species: Stipa tenacissima L. (resprouter), Cistus clusii Dunal and Rosmarinus officinalis L. (obligate seeders). We evaluated responses to different scenarios in relation to intensification of summer droughts and forest management to obtain differences in water stress, growth, and gas exchange to cope with summer drought. Drought was induced by using rain-exclusion shelters and recorded ecophysiological characteristics were obtained with a portable gas exchange system. The main tree species recruitment was poor, but companion species showed a high survival ratio. Lower water stress was found for obligate seeder seedlings, which was higher in logged areas with induced drought. The initial post-fire stage was similar for the studied areas. However, after two drought periods (2010 and 2011), significant differences were found in the morphological and ecophysiological responses. In the unmanaged area, the biggest size of individuals due to the most marked increases in height and coverage were observed mainly in resprouter S. tenacissima. In the area submitted to salvage logging, the growth ratios in plots with induced drought were lower, mainly for seeders. Greater productivity was related to higher transpiration, stomatal conductance, and net photosynthetic ratio, but lower water use efficiency was found in obligate seeders with no drought induction, and S. tenacissima obtained higher values in untreated areas. Our results confirm that both forest management and intensification of summer ...
Keywords	Wildfires ; adaptive forest management ; drought ; resilience ; ecophysiology ; Plant ecology ; QK900-989
Subject code	580
Language	English
Publishing date	2015-05-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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