Lothar Bach

• Bach-Freilandforschung

As part of the EU Emergency Regulation, the German government decided to significantly accelerate the approval procedures for the expansion of wind turbines, e.g. by largely reducing ecological impact assessments, allowing the use of wind turbines in landscape conservation areas to achieve fixed wind energy area contribution values. In order to inc...

Zusammenfassung im Jahr 2017 wurden auf den fünf Watten-meerinseln Spiekeroog, Wangerooge, Mellum, Neuwerk und Trischen Fledermäuse untersucht. ziel war es, genauere Daten zur Phänologie und zum Wanderverhalten der Fledermäuse zu bekommen. Die akustischen Dauererfassungen fanden von April/Anfang Mai bis Mitte/Ende Oktober statt. Auf Spiekeroog fand...

The wind energy-bat conflict is well documented for the onshore sector, with high numbers of casualties, specifically for migratory bat species. Offshore wind turbines might be a threat to bats as well, yet offshore bat migration is poorly documented. Accordingly, potential conflicts between bat conservation and offshore wind energy production are...

Bat migration across the baltic and Noth Sea. The report is available online at: https://bfn.bsz-bw.de/frontdoor/index/index/docId/1132

Large numbers of bats are killed by wind turbines globally, yet the specific demographic consequences of wind turbine mortality are still unclear. In this study, we compared characteristics of Nathusius' pipistrelles (Pipistrellus nathusii) killed at wind turbines (N = 119) to those observed within the live population (N = 524) during the summer mi...

RATIONALE Identifying migratory corridors of animals is essential for their effective protection, yet the exact location of such corridors is often unknown, particularly for elusive animals such as bats. While migrating along the German coastline, Nathusius’ pipistrelles (Pipistrellus nathusii) are regularly killed at wind turbines. Therefore, we e...

Acoustic monitoring of Nathusius’ pipistrelles (Pipistrellus nathusii): Is a second ultrasonic microphone at the tower needed? Wind energy is a major contributor of renewable energy, yet bats collide regularly with wind turbines (WT). To prevent such collisions, authorities of many federal states in Germany require the implementation of curtailmen...

Der nordwestdeutsche Küstenraum zeichnet sich durch eine hohe Anzahl an Windenergieanlagen (WEA) aus; gleichzeitig liegt er in einem wichtigen Reproduktionsgebiet der Rauhautfledermaus, die als schlaggefährdete Art im Fokus dieser Untersuchungen steht. Zudem befindet sich das Gebiet im Zugweg dieser Art. Zwischen 2011 und 2016 wurde von uns in dies...

Energie aus Windkraft spielt im Rahmen der Förderung erneuerbarer Energieträger eine immer größere Rolle, allerdings kollidieren Fledermäuse regelmäßig mit Windenergieanlagen (WEA). Um derartige Kollision zu verhindern, fordern Behörden im Rahmen von Genehmigungsverfahren die Einführung von Abschaltzeiten, zumeist unter Zuhilfenahme des Programms P...

This chapter collates the scope and limitations of technology and methods to quantify the density, identity, flight height and behaviour of bats and birds in the offshore environment, including both seabirds and migratory landbirds such as passerines and waterfowl. Such information is needed because offshore wind-farm development has reached the in...

The proportion of terrestrial bird species and bats migrating over the sea is much higher than one might assume. Especially during autumn migration, remarkable numbers of birds and bats can be recorded offshore. Consequently, the rapid, worldwide advance of offshore wind power facilities may pose a significant threat to migrating birds and bats in...

Bat migration was studied at Måkläppen (Falsterbo) between 2010 and 2015 by using the automated bat detectors (system AnaBat). All together 8802 bat contacts were recorded of at least nine species and the and a group consisting of the genera us Myotis and Plecotus, which that usually cannot be determined further distinguished with that detector sys...

First results of a project about offshore bat migration in the gernam part of the North and Baltic Sea.

Fledermäusen werden auf den ostfriesischen Inseln vor allem während der Zugzeiten festgestellt. Um zu ermitteln, ob auch Sommeraktivität festgestellt werden kann, wurden in der Wochenstubenzeit 2015 alle bewohnten ostfriesischen Inseln mit stationären Fledermausdetektoren beprobt. Dabei konnte lediglich auf der Insel Norderney ein Aktivitätsniveau...

Guidelines

The catastrophic nuclear meltdowns at Fukushima triggered a worldwide demand for renewable energy. As one of the few countries, Germany decided on an accelerated shift towards green energy, resulting in substantial conflicts with international conservation goals. Currently, large numbers of wind power facilities are erected in Germany, yet with unf...

We compiled the available information on the occurrence and timing of migratory bat activity across the Baltic Sea and south-eastern North Sea coasts and islands, based on ultrasonic monitoring projects at 19 localities in 2007–2009. The data refer to three species; Nathusius’ pipistrelle Pipistrellus nathusii, soprano pipistrelle P. pygmaeus and c...

Europe is faced with the need to tackle climate change and pollution and to find sustainable means to meet demands for energy generation. Thus the promotion of alternative methods for the production of energy such as wind power has been intensified. The low-emission production of wind energy brings benefits for the environment but on the other hand...

Im Frühjahr 2010 fand auf den Inseln Wangerooge, Mellum und Neuwerk eine systematische Erfassung der Fledermausaktivität mittels automatischer Ultraschallerfassungsanlagen (AnaBat-Detektoren) statt. Auf Wangerooge kamen zusätzlich automatische Erfassungsgeräte (Horchkisten, Borstboxen) entlang eines Nord-Süd verlaufenden Transektes im Osten der Ins...

Im Jahr 2008 wurden in einem Buchenwald in Niedersachsen AnaBat-Detektoren in drei verschiedenen Höhen (4m, 15m, 30m) installiert, um kontinuierlich zwischen April und November die Fledermausaktivität zu erfassen. Die Ergebnisse zeigen, dass sich die Artenzusammensetzung innerhalb des Waldes und oberhalb der Baumkronen (Station 3, 30m) deutlich unt...

This note is based on a literature search and a recent review of bat mortality data from wind farms in Europe (published elsewhere). We suggest that mortality of bats at wind turbines may be linked to high-altitude feeding on migrating insects that accumulate at the turbine towers. Modern wind turbines seem to reach high enough into the airspace to...

We reviewed published and unpublished written reports on bat mortality at wind farms in northwestern Europe. The estimated number of bats killed per turbine annually was relatively low (0-3) on flat, open farmland away from the coast, higher (2-5) in more complex agricultural landscapes, and highest (5-20) at the coast and on forested hills and rid...

We studied bats migrating and foraging over the sea by direct observations and automatic acoustic recording We recorded 11 species (of a community of 18 species) flying over the ocean up to 14 km from the shore. All bats used sonar during migration flights at sea, often with slightly lower frequencies and longer pulse intervals compared to those us...

The different effects of wind turbines on bat behaviour are discussed here and collisions during bat migrations play an important part. Very little is known about the impacts of turbine ultrasounds. A change in space use due to shifting and loss of summer foraging habitats has been proved for the Serotine bat (Eptesicus serotinus), but in the same...

Fragmentation of the landscape is one of the greatest problems for animals which use large home ranges and/or different habitats within a landscape. Even in the case of undisturbed hunting habitats and roosts, disconnection of flight paths could lead to a decline in the populations of bats. Tunnels connecting both sides of a barrier, allowing excha...

The present paper deals with bat mortality in Germany due to the action of wind turbines (up to now, 10 species in Germany and 15 in Europe) which is known at the present. According to the studies conducted in Brandenburg and Saxony it appears that most dead bats are found at the end of summer and during the autumn migration, a fact that is not sta...

Fragmentation of the landscape is one of the greatest problems for animals which use large home ranges and/or different habitats within a landscape. Even in the case of undisturbed hunting habitats and roosts, disconnection of flight paths could lead to a decline in the populations of bats. Tunnels connecting both sides of a barrier, allowing excha...

Introduction As climate change represents one of the key threats to biodiversity, there is increasing focus on the development of alternative energies. Wind energy is actually the most prominent form of alternative energy being developed in Europe as it seems to help to reduce pollution from fossil fuels. However, it has also a high potential to ca...