Teresa Buchaca - Academia.edu (original) (raw)

Papers by Teresa Buchaca

This dataset is associated to the paper titled: "Alien fish eradication from high mountain l... more This dataset is associated to the paper titled: "Alien fish eradication from high mountain lakes by multiple removal methods: estimating residual abundance and eradication probability in open populations" by R Tiberti, T Buchaca, D Boiano, RA Knapp, Q Pou Rovira, G Tavecchia, M Ventura, S Tenan.<br>Each row represent a fish removal session from several alien fish eradication actions from the European Alps (Italy), Pyrenees (Catalunya, Spain) and Sierra Nevada (California, Usa); data have to be filled into 9 columns: <br>• Column 1: "site_id": this is a unique identifier of the site (e.g., the name of the lake, an identification code, or a number). Make sure the site name o a site is always written in the same way. If different sites were under treatment, you can add them here.• Column 2: "date": this is the date of the removal sessions (dd/mm/yyyy).• Column 3-5: "method1", "method2"," method3"; data from differe...

SIBIC 2022, Jun 2, 2022

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

Freshwater Biology

Risk analyses for invasive species often assume that the characteristics of future invaders will ... more Risk analyses for invasive species often assume that the characteristics of future invaders will resemble those already successful, but these features may change. Here, we use data from more than 3,500 fish sampling events, sequencing of mitochondrial and nuclear genes and analyses of several traits describing non‐native fish to describe the irruption and rapid expansion of non‐native loaches in Catalonia, north‐east Iberian Peninsula, and framing this surge in the knowledge of previous invasions. We report the establishment of at least five (Cobitis bilineata, Misgurnus anguillicaudatus, Misgurnus bipartitus, Paramisgurnus dabryanus, and a yet undescribed Barbatula species) non‐native loach species in Catalonia, most of which are currently spreading. Furthermore, one of the two regionally native loach species (Cobitis paludica) has been introduced and is spreading through river basins where it is not native. Genetic analyses were fundamental to understand loach invasions, by clarif...

Biodiversity and Conservation

Identifying and quantifying global change impacts on biotic and abiotic components of ecosystems ... more Identifying and quantifying global change impacts on biotic and abiotic components of ecosystems is critical to promote an effective adaptation that increases the success of conservation strategies. To achieve this goal, global and regional assessment efforts require certain degree of harmonization on local monitoring programs to establish relevant comparisons at different spatio-temporal scales. Otherwise, the lack of harmonization might hinder the detection and assessment on the effects of human impacts. In this work we have compiled information on freshwater monitoring programs located in areas of intensive research and conservation interest: International Long Term Ecological Research (ILTER) nodes and mountain National Parks. We aimed at evaluating the quality and robustness of these programs to assess the impact of global change, addressing from the worldwide to the European and Spanish national scale. Results highlighted that freshwater monitoring programs lack a common strat...

CSIC - Centro de Estudios Avanzados de Blanes (CEAB), 2019

Removal of introduced fish as a restoration measure in high mountain lakes POU-ROVIRA et. al Chan... more Removal of introduced fish as a restoration measure in high mountain lakes POU-ROVIRA et. al Changes in lakes after the reduction of fish densities BUCHACA et. al Rapid recovery of amphibian populations in eight high mountain lakes linked to the eradication of exotic fish MIRÓ et. al Alterations and changes that affect the conservation of the biodiversity of Estanho de Vilac (Aran Valley) CARRILLO et. al The Trescuro mire system: how sharp environmental gradients and climatic events constrain the local distribution of plant community types COLOMER et. al

CSIC - Centro de Estudios Avanzados de Blanes (CEAB), 2019

Discovering hidden biodiversity: the use of complementary

AGUFall Meeting 2019 in San Francisco, 9 – 13 December 2019Ecological resistance and resilience o... more AGUFall Meeting 2019 in San Francisco, 9 – 13 December 2019Ecological resistance and resilience of freshwater coastal back-barrier perched lakes are intimately linked to the stability of the sand-barrier enclosing them, which controls the inflow of seawater. We address the long-term ecological changes (2,700 cal yr BP to present) in one of these systems in NW Spain (Doniños, A Coruña) from a multi-proxy paleoecological reconstruction based on biological, physical, and chemical analyses of its lacustrine sedimentary record, as well as on GPR surveys of the sand barrier. Although human intervention cannot be completely disregarded, AMS 14C and OSL datings show that ecological changes were synchronous with the main climatic periods of the studied interval. The ancient freshwater lake was catastrophically emptied due to barrier breaching coinciding with the increase of storms within the Dark Ages (350-750 CE) and the Little Ice Age (LIA, 1500-1930 CE), the latter characterized by an active retrograding sand barrier. Erosion induced by storms and increased rainfall generated two hiatuses which left no record of the ecological recovery of the system. By contrast, the transition from the Medieval Climate Anomaly to the LIA (1100-1500 CE) shows a gradual ecological transformation from an isolated lake towards a transitional shallow choked lagoon and, finally, an intermittent tidal lagoon, which lasted approx. 200 yr. Although determining whether an observed ecosystem change represents a regime shift in the framework of the Alternative Stable States Hypothesis is difficult in highly variable systems, this gradual change is here not ascribed as a sudden non-linear ecological regime shift. A 210Pb age-model for the upper sediments shows that the current freshwater lake was established c. 1945 CE, after the dune fields stabilized in the region associated to the known decrease in storm and wind intensities. Changes in the main North Atlantic atmospheric patterns in the last decades are considered the ultimate agents of the complete isolation of the lake from the sea. This work stresses the need of a detailed knowledge of the stratigraphy of the sand-barrier and the lacustrine infilling for reliable reconstructions of the long-term ecological trajectories of coastal perched lakes.This research was funded by projects RapidNAO (CGL2013-40608-R) and PaleoModes (CGL2016-75281-C2

Journal of Paleolimnology, 2016

Lakes with varved sediments are especially well suited for paleoecological study, from annual to ... more Lakes with varved sediments are especially well suited for paleoecological study, from annual to even seasonal resolution. The interpretative power of such high-resolution paleoenvironmental reconstructions relies on the availability of modern analogs with the same temporal resolution. We studied seasonal pollen sedimentation in varved Lake Montcortès, Central Pyrenees (Spain), as a modern analog for high-resolution reconstruction of Late Holocene vegetation and landscape dynamics. Seasonal samples were obtained from sediment traps that were submerged near the maximum water depth for a two-year period (Fall 2013 to Fall 2015). Seasonal pollen sedimentation was compared with meteorological variables from a nearby weather station. Bulk pollen sedimentation, dominated by Pinus (pine) and Quercus (oak), followed a clear seasonal pattern that peaked during the spring/summer (SS), coinciding with maximum temperature and precipitation, minimum relative humidity and moderate winds from the SSE. Pollen sedimentation lags (PSL) were observed for most pollen types, as substantial amounts of pollen were found in the traps outside of their respective flowering seasons. Two pollen assemblages were clearly differentiated by their taxonomic composition, corresponding to spring/summer and fall-winter (FW). This pattern is consistent with existing interpretation of the sediment varves, specifically, that varves are formed by two-layer couplets that represent the same seasonality as pollen. We concluded that pollen sedimentation in Lake Montcortès exhibits a strong seasonal signal in the quantity of pollen, the taxonomic composition of the pollen, and relationships between the pollen and meteorological variables. Thus, varved sediments provide a potentially powerful tool for paleoecological reconstruction at seasonal resolution. This method could be used not only to identify paleoenvironmental trends, but also to identify annual layers and therefore date sediments, even in the absence of evident sediment laminations. A satisfactory explanation of PSL will require further studies that examine internal lake dynamics and pollen production/dispersal patterns.

Quaternary Science Reviews, Mar 1, 2023

Advances in global change research, 2017

High mountain lakes are originally fishless, although many have had introductions of non-native f... more High mountain lakes are originally fishless, although many have had introductions of non-native fish species, predominantly trout, and recently also minnows introduced by fishermen that use them as live bait. The extent of these introductions is general and substantial often involving many lakes over mountain ranges. Predation on native fauna by introduced fish involves profound ecological changes since fish occupy a higher trophic level that was previously inexistent. Fish predation produces a drastic reduction or elimination of autochthonous animal groups, such as amphibians and large macroinvertebrates in the littoral, and crustaceans in the plankton. These strong effects raise concerns for the conservation of high mountain lakes. In terms of individual species, those adapted to live in larger lakes have suffered a higher decrease in the size of their metapopulation. This ecological problem is discussed from a European perspective providing examples from two study areas: the Pyrenees and the Western Italian Alps. Species-specific studies are urgently needed to evaluate the conservation status of the more impacted species, together with conservation measures at continental and regional scales, through regulation, and at local scale, through restoration actions, aimed to stop further invasive species expansions and to restore the present situation. At different high mountain areas of the world, there have been restoration projects aiming to return lakes to their native fish-free status. In these areas autochthonous species that disappeared with the introduction of fish are progressively recovering their initial distribution when nearby fish-free lakes and ponds are available.

SIBIC 2022, Jun 2, 2022

Freshwater Biology

Biodiversity and Conservation

CSIC - Centro de Estudios Avanzados de Blanes (CEAB), 2019

Discovering hidden biodiversity: the use of complementary

Journal of Paleolimnology, 2016

Quaternary Science Reviews, Mar 1, 2023

Advances in global change research, 2017