Détail de l'auteur
Auteur Esperança Gacia i Passola |
Documents disponibles écrits par cet auteur (11)
Affiner la rechercheComposition, distribution and biomass of benthic macrophyte communities from lake Baciver a Spanish alpine lake in Central Pyrenees / Enric Ballesteros (1989)
Titre : Composition, distribution and biomass of benthic macrophyte communities from lake Baciver a Spanish alpine lake in Central Pyrenees Type de document : Tiré à part de revue Auteurs : Enric Ballesteros (1958-) ; Esperança Gacia i Passola ; Lluis Camarero Année de publication : 1989 Importance : 177-184 Langues : Anglais (eng) Catégories : [CBNPMP-Géographique] Baciver
[CBNPMP-Géographique] Pyrénées centrales
[CBNPMP-Thématique] Biomasse
[CBNPMP-Thématique] Communautés hygrophiles (eau dormante)Identifiant : DOI : 10.1051/limn/1989017 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=129427 Ballesteros, Enric (1958-), Gacia i Passola, Esperança, Camarero, Lluis 1989 Composition, distribution and biomass of benthic macrophyte communities from lake Baciver a Spanish alpine lake in Central Pyrenees. Annales de Limnologie, 25(2) : 177-184.Documents numériques
Consultable
Article (1989)URL
Titre : Effects of building up a dam in a shallow montain lake (Baciver, Central Pyrennees) Type de document : Tiré à part de revue Auteurs : Enric Ballesteros (1958-) ; Esperança Gacia i Passola Année de publication : 1998 Importance : 55-66 Langues : Anglais (eng) Catégories : [CBNPMP-Géographique] Baciver
[CBNPMP-Géographique] Pyrénées centrales
[CBNPMP-Géographique] Val d'Aran
[CBNPMP-Thématique] Enjeux de conservation des lacs d'altitude
[CBNPMP-Thématique] Impact sur l'hydrologie fluviale et lacustre
[CBNPMP-Thématique] Lac d'altitudeMots-clés : Littorelletea Isoëtes Résumé : Efectos del represamiento de un lago somero de montaña (Baciver, Pirineos centrales). Se estudiaron los cambios en el agua, el sedimento y la estructura y dinámica de las poblaciones de macrófitos sumergidos después del represamiento de un lago de alta montaña de los Pirineos a finales del verano de 1990. Las variaciones más notables de las características físicas y químicas fueron: a) elevación de 5,5 m del nivel del litoral; b) disminución de la transmitancia de la luz en la columna de agua; c) depleción de oxígeno en las aguas profundas, junto a la reducción del pH y al aumento de la conductividad y de la concentración de cationes; d) aumento de la concentración de nitrógeno disuelto total (principalmente amonio) y de fósforo en la columna de agua, y e) aumento de los compuestos de N reducidos (nitrito y amonio) en el agua intersticial de la comunidad de Isoetes lacustris, ligada a una disminución del nitrato. Los cambios en las características químicas parecen estar relacionados con la descomposición de la materia orgánica aportada por los prados y matorrales subalpinos terrestres, así como por la vegetación sumergida del lago. Tanto el área ocupada por la vegetación sumergida como el número de especies de macrófitos experimentaron una importante reducción con el represamiento del lago Baciver. Todas las especies pequeñas, no dominantes (Eleocharis acicularis, Subularia aquatica e Isoetes setacea), desaparecieron a lo largo del verano de 1991. Sparganium angustifolium experimentó un proceso de degradación (baja densidad de pies, hojas cortas) en 1991 que condujo a su completa desaparición en la primavera de 1992. La fuerte atenuación del régimen de iluminación podría explicar dichas pérdidas. Los individuos de Isoetes lacustris que originalmente vivían por debajo de los 0,6 m de profundidad estaban completamente muertos en el verano de 1991, probablemente debido a la depleción invernal de oxígeno. Las únicas plantas de Isoetes que sobrevivieron (las que originalmente vivían por encima de los 0,6 m de profundidad y que después del represamiento se hallaban entre 5,8 y 6,1 m) aumentaron su longitud foliar como respuesta a la reducción de irradiancia disponible. Aunque el número de hojas producidas fue ligeramente menor en 1991 de lo que era antes del represamiento, la biomasa producida aumentó, pues las hojas eran más largas. Sin embargo, la pérdida de hojas fue muy grande, lo que produjo una reducción global de la población. A finales de la primavera de 1992, los Isoetes lacustris supervivientes tenían las hojas restantes muy dañadas, probablemente debido a la anoxia invernal, y no se produjo ninguna hoja nueva en el verano de 1992. Esto condujo a la desaparición total de la comunidad en el lago. Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=131057 Ballesteros, Enric (1958-), Gacia i Passola, Esperança 1998 Effects of building up a dam in a shallow montain lake (Baciver, Central Pyrennees). Oecologia aquatica, 11 : 55-66.Documents numériques
Consultable
Article (1998)Adobe Acrobat PDFFunctional diversity of macrophyte communities within and between Pyrenean lakes / Esperança Gacia i Passola in Journal of limnology, 68 (1) (2009)
Titre : Functional diversity of macrophyte communities within and between Pyrenean lakes Type de document : Numérique Auteurs : Esperança Gacia i Passola ; Eglantine Chappuis ; Ana Lumbreras ; Joan Riera ; Enric Ballesteros (1958-) Année de publication : 2009 Article en page(s) : 25-36 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Eaux douces
[CBNPMP-Thématique] Lac d'altitude
[CBNPMP-Géographique] PyrénéesMots-clés : Isoëtes Résumé : Submersed vegetation is a common feature in about 70% Pyrenean high mountain (>1500 m a.s.l.) lakes. Isoetids and soft-water elodeids are common elements of this underwater flora and can form distinct vegetation units (i.e. patches of vegetation dominated by different species) within complex mosaics of vegetation in shallow waters (<7 m). Since isoetids exert a strong influence on sediment biogeochemistry due to high radial oxygen loss, we examined the small scale characteristics of the lake environment (water and sediment) associated to vegetation patches in order to ascertain potential functional differences among them. To do so, we characterised the species composition and biomass of the main vegetation units from 11 lakes, defined plant communities based on biomass data, and then related each community with sediment properties (redox and dissolved nutrient concentration in the pore water) and water nutrient concentration within plant canopy. We also characterised lake water and sediment in areas without vegetation as a reference. A total of twenty-one vegetation units were identified, ranging from one to five per lake. A cluster analysis on biomass species composition suggested seven different macrophyte communities that were named after the most dominant species: Nitella sp., Potamogeton praelongus, Myriophyllum alterniflorum, Sparganium angustifolium, Isoetes echinospora, Isoetes lacustris and Carex rostrata. Coupling between macrophyte communities and their immediate environment (overlying water and sediment) was manifested mainly as variation in sediment redox conditions and the dominant form of inorganic nitrogen in pore-water. These effects depended on the specific composition of the community, and on the allocation between above- and belowground biomass, and could be predicted with a model relating the average and standard deviation of sediment redox potential from 0 down to -20 cm, across macrophyte communities. Differences in pore-water total dissolved phosphorus were related to the trophic state of the lakes. There was no correlation between sediment and water column dissolved nutrients. However, nitrate concentrations tended to be lower in the water overlaying isoetid communities, in apparent contradiction to the patterns of dissolved nitrates in the pore-water. These tendencies were robust even when comparing the water overlaying communities within the same lake, thus pointing towards a potential effect of isoetids in reducing dissolved nitrogen in the lakes. Identifiant : DOI : 10.4081/jlimnol.2009.25 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=141550
in Journal of limnology > 68 (1) (2009) . - 25-36Gacia i Passola, Esperança, Chappuis, Eglantine, Lumbreras, Ana, Riera, Joan, Ballesteros, Enric (1958-) 2009 Functional diversity of macrophyte communities within and between Pyrenean lakes. Journal of limnology, 68(1): 25-36.Documents numériques
Consultable
Article (2009)URL
Titre : Global assessment of aquatic Isoëtes species ecology Type de document : Imprimé Auteurs : Mattia M. Azella ; Alice Dalla Vecchia ; Thomas Abeli ; Janne Alahuhta ; Victor B. Amoroso ; Enric Ballesteros (1958-) ; Vincent Bertrin (1978-) ; Daniel F. Brunton ; Alexander A. Bobrov ; Cecilio Caldeira ; Simona Ceschin ; Elena V. Chemeris ; Martina Čtvrtlíková ; Mary de Winton ; Esperança Gacia i Passola ; Oleg G. Grishutkin ; Deborah Hofstra ; Daniella Ivanova ; Maria O. Ivanova ; Nikita K. Konotop ; Danelle M. Larson ; Sara Magrini ; Marit Mjelde ; Olga A. Mochalova ; Guilherme Oliveira ; Ole Pedersen ; Jovani B. de S. Pereira ; Cristina Ribaudo ; María Inmaculada Romero Buján ; Angelo Troía ; Yulia S. Vinogradova ; Polina A. Volvoska ; Daniel Basílio Zandonadi ; Nadezhda V. Zueva ; Rossano Bolpagni Année de publication : 2024 Article en page(s) : 1420-1437 Langues : Anglais (eng) Mots-clés : Isoetes echinospora Durieu, 1861 Isoetes lacustris L. Résumé : Isoëtes are iconic but understudied wetland plants, despite having suffered severe losses globally mainly because of alterations in their habitats. We therefore provide the first global ecological assessment of aquatic Isoëtes to identify their environmental requirements and to evaluate if taxonomically related species differ in their ecology.
The assessment resulted in an extensive new database on aquatic Isoëtes, ecological niche analyses, and descriptive species accounts. We compiled a global database that includes all known environmental data collected from 1935 to 2023 regarding aquatic Isoëtes. We then evaluated the environmental drivers of 16 species using 2,179 global records. Additionally, we used hypervolume analysis to quantify the ecological niches of the two species with the greatest number of records, finding significant differences and evidence that Isoëtes echinospora occupies a wider ecological niche than Isoëtes lacustris.
Fifty-nine species (30% of the c. 200 Isoëtes species known today) were categorised as aquatic and were mainly reported in the Americas and northern Europe. About 38% of the aquatic species are threatened with extinction or are endemic to a small region, according to the International Union for Conservation of Nature's Red List in 2023. Many species were determined to be sensitive to certain water physical and chemical factors, generally preferring oligotrophic conditions such as low total phosphorus, moderate total nitrogen, moderate to low pH, and low conductivity.
This analysis includes ecological data in the assessment of rare/threatened aquatic plants globally. This new database and the ecological analyses completed defined the ecological requirements of several species and identified knowledge gaps, which can aid management actions and future research.
This paper highlights ecological significance and environmental sensitivities of aquatic Isoëtes. The current level of knowledge is inadequate for a large proportion of known taxa. We affirm the extreme need to support global, collaborative initiatives on which to build future conservation strategies.
Identifiant : DOI : 10.1111/fwb.14316 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=153664
in Freshwater Biology > 69 (10) (2024) . - 1420-1437Azella, Mattia M., Dalla Vecchia, Alice, Abeli, Thomas, Alahuhta, Janne, Amoroso, Victor B., Ballesteros, Enric (1958-), Bertrin, Vincent (1978-), Brunton, Daniel F., Bobrov, Alexander A., Caldeira, Cecilio, Ceschin, Simona, Chemeris, Elena V., Čtvrtlíková, Martina, Winton, Mary de, Gacia i Passola, Esperança, Grishutkin, Oleg G., Hofstra, Deborah, Ivanova, Daniella, Ivanova, Maria O., Konotop, Nikita K., Larson, Danelle M., Magrini, Sara, Mjelde, Marit, Mochalova, Olga A., Oliveira, Guilherme, Pedersen, Ole, Pereira, Jovani B. de S., Ribaudo, Cristina, Romero Buján, María Inmaculada, Troía, Angelo, Vinogradova, Yulia S., Volvoska, Polina A., Zandonadi, Daniel Basílio, Zueva, Nadezhda V., Bolpagni, Rossano 2024 Global assessment of aquatic Isoëtes species ecology. Freshwater Biology, 69(10): 1420-1437.Documents numériques
Article (2024)URL
Titre : Limnology in the pyrenean lakes Type de document : Tiré à part de revue Auteurs : Jordi Catalán ; Enric Ballesteros (1958-) ; Lluis Camarero ; Marisol Felip ; Esperança Gacia i Passola Année de publication : 1992 Importance : 27-38 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Eaux douces Mots-clés : Isoëtes Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=134195 Catalán, Jordi, Ballesteros, Enric (1958-), Camarero, Lluis, Felip, Marisol, Gacia i Passola, Esperança 1992 Limnology in the pyrenean lakes. Limnética, 8 : 27-38.Documents numériques
Article (1992)URL
PermalinkPaisatgistica i el functionament de les comunitats de macròfits dels estanys del Parc nacional d'Aigüestortes y estany de Sant Maurici / Esperança Gacia i Passola (2008)
PermalinkPermalink
Permalink
Permalink
Permalink
