Aportació al coneixement de la distribució d’anostracis i notostracis (Crustacea: Branchiopoda) als Països Catalans

Es donen a conèixer noves citacions de Triops cancriformis, Chirocephalus diaphanus, Branchipus schaefferi i Tanymastix stagnalis als Països Catalans i dues noves citacions a la península Ibèrica. S'ha revisat bibliogràficament les citacions anteriors d'aquestes espècies en l'àmbit iberobalear. Es descriu les característiques dels hàbitats on s'han localitzat les quatre espècies. S'amplia el rang de distribució geogràfica i altitudinal de T. stagnalis a la península Ibèrica. Es constata una disminució en les poblacions de T. cancriformis en arrossars on abans eren abundants. Moltes localitzacions estan dins o properes a territoris sota alguna figura de protecció i, per tant, és important una major sensibilitat per part de la gestió d'aquests territoris en la conservació d'ambients temporanis. Un millor coneixement de la distribució d'aquestes espècies és la base per a la seva protecció necessària i eficient i per la protecció dels seus hàbitats.Triops cancriformis, Chirocephalus diaphanus, Branchipus schaefferi and Tanymastix stagnalis are recorded in several new localities of Iberian Peninsula. A literature review of the previous localities is done. It is described the characteristics of the habitats in those that the four species have been located. This paper extends the geographic and altitudinal distribution range of T. stagnalis in the Iberian Peninsula. A reduction of T. cancriformis populations has been detected in rice fields where they were abundant. A significant number of localities are inside or near protected areas, so it is important a sensitivity in the management of these areas for the conservation of temporary waters. A better knowledge of the distribution of these species is the basis for a necessary and efficient species and habitat protection.Se dan a conocer nuevas citas de Triops cancriformis, Chirocephalus diaphanus, Branchipus schaefferi y Tanymastix stagnalis para los Països Catalans y dos nuevas citas para la Península Ibérica. Se ha revisado bibliográficamente las anteriores citas de estas especies en el ámbito iberobalear. Se describe las características de los hábitats en los que se han localizado las cuatro especies. Se amplía el rango de distribución geográfico y altitudinal de T. stagnalis en la Península Ibérica. Se constata una disminución de las poblaciones de T. cancriformis en arrozales donde antes eran abundantes. Muchas localizaciones están dentro o cerca de zonas protegidas, y por lo tanto es importante una mayor sensibilidad en la gestión de estas zonas con la conservación de los ambientes acuáticos temporales. Un mejor conocimiento de la distribución de estas especies es la base para su necesaria y eficiente protección y para la protección de sus hábitats

Primeros datos sobre la distribución de grandes branquiópodos (Crustacea: Branchiopoda) en la Región de Murcia (SE España)

En el presente trabajo se aportan los primeros datos sobre la distri- bución de varias especies de grandes branquiópodos (crustáceos de los órdenes Anostraca y Notostraca), en la Región de Murcia. Los muestreos se desarrollaron durante los años 2012 y 2103 en cuerpos de agua temporales pertenecientes a la tipología de char- cas ganaderas. Se ha constatado la presencia de tres especies: los anostráceos Branchipus schaefferi y Streptocephalus torvicor- nis,y el notostráceo Triops cancriformis/simplex. La especie más ampliamente distribuida fue S. torvicornis

Llacunes de nova creació

Oasis d'optimisme enmig de la degradaci&oacute

Intra and inter-annual variation of functional structure of macroinvertebrate assemblages in Mediterranean temporary ponds

Temporal variation of the functional structure of macroinvertebrate assemblages in Mediterranean temporary ponds has been studied in Sardinia (Italy). Sixteen small and shallow ponds (less than 2 ha and less than 2 m deep) subject to low human pressure were sampled in different periods

COLONIZATION PROCESS IN NEW CREATION MEDITERRANEAN COASTAL LAGOONS

The colonization process in new creation Mediterranean salt marsh lagoons is influenced by hydrological fluctuations characterised by flooding-confinement periods. This pattern has direct effects on water characteristics (such as nutrient concentration), but it also effects the connectivity structure between lagoons impacting main metacommunity dynamics. Unfortunately, these ecosystems have suffered transformations due to urbanization process that has contributed to its degradation. This is the case of La Pletera salt marshes, located in the NE of Catalonia, in where a recovery and restoration European LIFE project (LIFE13 NAT/ES/001001) that included the restoration of existing lagoons and the creation of new ones has been done. In this study, we analysed the structure of aquatic macrofauna community of these new created lagoons just after its creation and five years after its creation with the aim of assessing the colonization assembly process. Our results showed a fast colonization of the species with active dispersion since they dominated the communities right after lagoon creation (Diptera). In contrast, species with passive dispersion (Gastropoda and Amphipoda) that have a lower dispersive capacity were dominant at the last sampling survey, 5 years after creation. This could be explained by flooding periods that connect all wetland waterbodies favouring the arrival of both, active and passive dispersers. Moreover, we observed an increase in the abundance and biomass of taxa with lower dispersion capacity but without affecting the overall community richness values

Is Microtox® toxicity related to potentially harmful algae proliferation in Mediterranean salt marshes?

Is Microtox® toxicity related to potentially harmful algae proliferation in Mediterranean salt marshes? Mediterranean salt marshes are ecosystems that are highly influenced by sea changes and freshwater inputs from runoff. In these ecosystems, toxic and nontoxic algae blooms often produce Jarge and unpredictabJe biomasses of phytoplankton. The Microtox@) test has been described as a successful, quick method for detecting toxicity in various phytoplankton taxa. Our study sought to test the efficiency of Microtox® in detecting toxic HAB in Mediterranean salt marshes. The results showed that the Microtox® test was able to detect toxic substances in the particulate matter of several lagoons in the Emporda salt marshes. This Microtox® toxicity coincided with periods when potentially harrnful cyanobacteria, dinoflagellates and haptophytes had a high biomass. The results suggest that potentially harmful phytoplankton cannot be ruled out as a source of Microtox® toxicity or as a source of other organism kills and subacute effects in Mediterranean salt marshes.Las marismas mediterráneas son ecosistemas altamente injluenciados por la entrada de agua marina y de agua dulce, procedente de la escorrentía. En estos ecosistemas, las proliferaciones de algas tóxicas y no tóxicas sin patrón temporal o espacial, alcanzan altas e impredecibles biomasas de fitoplancton. El ensayo Microtox® ha sido descrito como un rápido y eficiente método para detectar la toxicidad de diferentes taxones de fitoplaneton. Nosotros hemos hecho una primera aproximación para determinar la eficiencia del test Microtox® en la detección de proliferaciones algales tóxicas en las marismas mediterráneas. Se ha podido concluir que hay substancias tóxicas, en la materia particulada de diversas lagunas de las marismas del Emporda, que el método Microtox® es capaz de detectar. Esta toxicidad detectada por Microtox® se da en periodos en que cianobacterias, dinojlagelados y haptófitos potencialmente tóxicos presentan alta biomasa. Los resultados sugieren que el fitoplancton potencialmente tóxico no puede ser descartado como causante de la mortalidad o de efectos subagudos a otros organismos de las marismas mediterráneas

Expansion of the exotic unionid Sinanodonta woodiana in low Ter River flood plain (Catalonia)

Póster presentado en: 2nd International Seminar Rearing of unionoid mussels (Clervaux, Luxembourg - Tuesday 24th November – Friday 27th November 2015)In the northeast Catalonia, 4 native unionid species have been cited: Potomida littoralis (Cuvier, 1798), Unio mancus Lamarck, 1819, Unio ravoisieri Deshayes, 1847, and Anodonta anatina (L, 1758). Recently the exotic Sinanodonta woodiana (Lea, 1834), has been cited on Ter and Fluvià rivers. Between 1995 and 2014, several specific surveys were carried out, always below the Pasteral dam, both in the Ter river and in several of its tributaries, including Lake Banyoles. Moreover, from 2010 to 2014 a thorough freshwater bivalves prospection campaign was performed in the alluvial plain of lower Ter, including the river and secondary water masses, mainly irrigation channels associated with the traditional system of agricultural irrigation. The prospections were done by manually on the river bed bottom. All over since 2010 a total of 90 sampling stations has been surveyed in this alluvial plain. Status of native species is precarious, with populations intensely fragmented, and densities often low and heavily aged for lack of recruitment. This situation is clearly attributable to the severe rarefaction of native fish species, since in some areas even completely inexistent. In contrast, the exotic S. woodiana is expanding and occupies already the whole alluvial plain and the lower course of the Ter river, where it is very abundant. Moreover, S. woodiana presents a well-structured global population in the alluvial plain of Ter River and a regular recruitment can be observed thanks to the fact that several exotic fish species are abundant in the area, are potential hosts to them. This exotic unionoid appeared in most of the surveyed localities (81%), and was present in all the types of water bodies surveyed. In 16 % of the localities it was the only unionoid found, and it was present in all of the localities were other unionoid species were present. Specimens of this exotic species found alive constituted the 72 % of the total of alive unionoids collected during the surveying campaigns. Besides this species were quantitatively dominant in the whole of the alluvial plain. Therefore, it is the most spread and abundant unionoid species at present, often with very high densities. It presented a continuous distribution in the lower Ter river basin, as well as in the main irrigation canals.Peer reviewe