News


CLAIMES Project Meeting

R. Kurmayer, U. Schirpke, V. Fontana, C. Matulla, M. Ohndorf, K. Enigl, M. Ebner, H. Pritsch and S. Vorhauser met on 12.11.2019 in Innsbruck for a general CLAIMES project meeting. The current project status and the plans in the individual work packages were discussed. The latest news from the three work packages (WP) were presented.

In WP 1 the lake samplings for this season were completed on 11.10.2019. Samples will be analyzed beginning next year. Data on water chemistry and physicochemical parameters are compared to the historical data from 1998/99. A report on the project and the samplings is in progress and will be completed by end of the year and sent by email to the owners and tenants as well as to the water protection agencies and the responsible communities of the sampled lakes. The climatologists gave an overview of the potentially available data. In particular, it is planned to create a high temporal resolution (monthly to daily if required) of the temperature of the individual lakes.

An intense literature research was carried out by WP 2 on the topic of ecosystem services related to alpine lakes. For next steps regarding the search and selection of indicators for the ES, the results of the expert round table and the stakeholder workshops in South Tyrol are awaited. Furthermore, the results from the SIL-workshop given in October at the SIL-Austria Conference in Mondsee were discussed.

In WP 3 a first overview of the potential actors and stakeholders in the South Tyrolean project region was given. A sub-group (approx. 8-12 persons) from more than 40 actors will be invited for an introductory focus group meeting to identify the primary/most important ES of alpine lakes. The members of the focus group are from various areas of interest and different institutions. They have a direct contextual reference and are key persons/institutions with high centrality and radius of impact. The pairwise-questionnaires of the ES weighting for South Tyrol will be carried out in the 1st quarter 2020. Further projects are the implementation of a (participatory) stakeholder and network analysis to describe the relationships between actors and their characteristics.

The next CLAIMES-Meeting will take place in April/May 2020.

online 12.11.2019


Field work ended

We have installed sediment traps and temperature recorders in a total of 25 lakes. These will be taken out by us in September 2020, thus ensuring that we include August as the warmest month of the year in the temperature records.

online 11.10.2019 


Publication within CLAIMES:

Ma T., Jiang Y., Elbehery A.H., Blank S., Kurmayer R., Deng, L. (2019). Resilience of planktonic bacterial community structure in response to short-term weather deterioration during the growing season in an alpine lake. Hydrobiologia, 1-14, https://link.springer.com/article/10.1007/s10750-019-04118-8
The disturbing effect of a short-term cooling period during summer on planktonic bacterial community structure of an alpine lake was investigated using 16S rDNA pyrosequencing. Proteobacteria, Actinobacteria, and Bacteroidetes constituted the most abundant phyla. During the sampling period (from July to August 2010), a sudden cooling period with high precipitation occurred, as indicated by a decrease in conductivity, calcium, and dissolved organic carbon concentration resulting from increased runoff. The relative abundance of Actinobacteria, Betaproteobacteria, and Cyanobacteria decreased during this short-term cooling period. Instead, a rapid shift from Betaproteobacteria to Gammaproteobacteria occurred, which was mainly caused by an increase of Acinetobacter rhizosphaerae. Soon after the short-term cooling period, warmer weather conditions got re-established and Betaproteobacteria recovered and became again dominant. Non-metric multi-dimensional scaling analysis and Venn diagrams revealed a planktonic bacterial community composition with high similarity at the beginning and the end of the growing season. Air temperature and precipitation were significantly correlated with the observed variation in operational taxonomic unit (OTU) relative abundance. It is concluded that, in response to the short-term cooling period, a distinct planktonic bacterial OTU community developed. It rapidly diminished, however, as summer conditions became re-established, implying the recovery of the original bacterial community structure.
 

Publication within CLAIMES:

Jiang Y., Huang H., Ma T., Ru J., Blank S., Kurmayer R., Deng, L. (2019). Temperature Response of Planktonic Microbiota in Remote Alpine Lakes. Frontiers in Microbiology 10: 1714. https://www.frontiersin.org/articles/10.3389/fmicb.2019.01714/full

Alpine lakes are considered pristine freshwater ecosystems and sensitive to direct and indirect changes in water temperature as induced by climate change. The bacterial plankton constitutes a key component in the water column and bacterial metabolic activity has direct consequences for water quality. In order to understand bacterial response to global temperature rise in five alpine lakes located in the Austrian Alps (1700–2188 m a.S.L.) water temperature was compared within a decadal period. Depth-integrated samples were characterized in community composition by 16S rDNA deep-amplicon sequencing early [56 ± 16 (SD) days after ice break up] and later (88 ± 16 days) in the growing season. Within the 10 years period, temperature rise was observed through reduced ice cover duration and increased average water temperature. During the early growing season, the average water temperature recorded between circulation in spring until sampling date (WAS), and the day of autumn circulation, as well as chemical composition including dissolved organic carbon influenced bacterial community composition. In contrast, only nutrients (such as nitrate) were found influential later in the growing season. Metabolic theory of ecology (MTE) was applied to explain the dependence of taxonomic richness on WAS in mathematical terms. The calculated activation energy exceeded the frequently reported prediction emphasizing the role of WAS during early growing season. Accordingly, the relative abundance of predicted metabolism related genes increased with WAS. Thus, the dominant influence of temperature after ice break up could be explained by overall climate change effects, such as a more intense warming in spring and an overall higher amplitude of temperature variation.


International Mountain Conference (IMC) in Innsbruck 08.-12.09.2019

CLAIMES at the IMC in Innsbruck, where R. Kurmayer chaired a workshop with the topic Lakes in Mountain regions as integrative landscape elements: ecosystem services (ES) and threats.

In the workshop it was talked about different subtopics. In the following the results of the workshop regarding the topic of alpine lakes limnology and ecosystem services which are relevant for the CLAIMES project are summarized.

1) Evaluating Ecosystem services (ES) (of lakes), comparing different tools to evaluate ecosystem services

It was noted that the evaluation of ES has its limits. For example is it still common to put a monetary value on an ecosystem. Though it is often ignored that some ecosystem services cannot be translated into monetary value. Another limit is that biodiversity as such is not directly reflected in the ES concept but rather indirectly through ecological functioning or nature conservation. Besides that the results of ES evaluation are potentially biased by the respective participants deciding on relevant ES. Nevertheless, it was found that ecosystem services assessment is a concept with limits, but is currently the best available method. As long as the weaknesses are known, the method can be refined to achieve effective results.

The aim of the ES concept is to take a multitude of aspects into account as well as different stakeholders. It is important to state that the ES concept is not limited to monetary techniques and should be seen as assisting a potential required decision basis. Indeed monetary techniques have been criticised because of the human centred vision producing unrealistic vales. Instead, participatory and deliberative approaches combining monetary and non-monetary techniques may be a more sustainable compromise in ES evaluation. When applying participatory approaches stakeholder selection (and participation) will be most crucial and requires a careful selection (including scientists from relevant disciplines).

2) Lake ecosystem services, translating limnological measurements to indicate ES

Usually the relevant ES will help to decide the appropriate limnological measurement and which parameters are required. It is further recommended to translate “biodiversity” to parameters that are better understood by stakeholders. Although for example the term “biodiversity” is standard among nature conservationists, it is difficult to translate on the political level. In transdisciplinary work, it is generally important to speak a language that is understandable to all. This makes it possible to exchange information between different disciplines, but also to ensure understanding between science, politics and the population.

3)  Lake climatology, merging lake surface temperature modelling with “real” temperature measurements

In general, lake surface temperature (LST) modelling can be seen as an alternative approach to temperature measurement and extrapolation. While the extrapolation of long-term series has provided important information on the prediction of lake temperature in the Alps, LST can hopefully be used to answer further questions.

An important field is the application of LST modelling to physical, chemical and biological consequences in temporal and spatial resolution. A higher temporal resolution for short-term changes might be relevant to cope with the consequences of heat waves, i.e. for the physical stability of the water column. Changes in light and nutrient availability and plankton composition can be expected because of temperature influences. Larger lakes also require a higher spatial resolution, especially if the lake morphometry leads to different basins with different amounts of water. 

Other subtopics of the workshop not directly related to the CLAIMES project were the anthropogenic impacts on lakes and their ecosystem services like nanoparticles, micro-plastics, endocrine disrupting compounds, persistent organic pollutants and new synthetic particles of which impacts on aquatic ecosystems are still unknown as well as the concept of metabarcoding. Metabarcoding is a rather recent approach taking advantage of deep-amplicon sequencing of taxonomic marker gene regions which have been amplified from aquatic environmental samples. Potential improvement by this technique include a more time and cost efficient acquisition of taxa inventories, a more rapid or even on time results provision, less dependence on microscopic and subjective species keys, and less invasive (and destructive) sampling (avoiding the sacrificing of specimen in fish). From a practical point of view metabarcoding is unlikely to replace BQE monitoring in the near future. Currently only qualitative estimates are provided, e.g. taxa inventories which could be used semi-quantitatively if protocols could be installed in a strict standardized manner. This method is used in the CLAIMES project but is not a focus.

CLAIMES presentations at IMC 2019

Fontana V., Ebner M., Kurmayer R., Schirpke U., Ohndorf M., Matulla C. (2019). CLAIMES - Climate response of alpine lakes: resistance variability and management consequences for ecosystem services. Talk given at the International Mountain Conference (IMC), University of Innsbruck, September 8-12, 2019.

Matulla C., Enigl K., Schlögl M., Kurmayer R., Schirpke U., Fontana V., Ohndorf, M.; Tordai, J.; Matulla, H.; Ressl, H.; Lehner, S.; Chimani, B. (2019). Alpine lake surface-temperatures - Reconstructions and Projections for assessing Ecosystem-Service availability. Talk given at the International Mountain Conference (IMC), University of Innsbruck, September 8-12, 2019.

U. Schirpke gave a poster presentation on the CLAIMES project and cultural ecosystem services at the IMC 2019. Please find the poster online on our ResearchGate project website.

 M. Ebner presented a poster on the CLAIMES project at the IMC 2019 as well. Please find the poster online on our ResearchGate project website.

online 12.09.2019


SIL-Austria Conference in Mondsee 28.-30.10.2019

On 29.10.2019 R. Kurmayer, U. Schirpke, M. Ebner and H. Pritsch held a workshop with the topic ‘Which indicators can be used for the representation of ecosystem services in lakes? From methodological aspects to ecological basis concepts.’ at the SIL-Austria Conference in Mondsee.

In the workshop, we aimed for indicators, which can be used to measure specific ecosystem services that are related to alpine lakes. Ecosystem services were divided into three groups: cultural, providing and regulating ecosystem services. For each selected ecosystem service at least one indicator was found. Depending on the ES indicators can be standard measurements in limnology, different hydrological parameters as well as the analysis of different media elements.

CLAIMES presentations at the SIL-Austria conference:

Kurmayer R., Matulla C., Fontana V., Schirpke U., Ohndorf M. (2019). CLAIMES - Climate response of alpine lakes: resistance variability and management consequences for ecosystem services. Talk given at the SIL-Austria Conference, Mondsee, October 28-30, 2019.


Fieldwork started

Currently the first CLAIMES field sampling campaign in 2019 at the Austrian lakes takes place. Please find some impressions from Twenger Almsee.

Beprobung TWE OSC Beprobung TWE

TWE TWE1

TWE2

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