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Book ; Online ; Thesis: Timing of sensory preferences in Camponotus Ants ; Gutachter: Claudia Groh-Baumann, Wolfgang Rössler, Jean-Marc Devaud, Heike Feldhaar

Lindenberg, Annekathrin [Verfasser] / Groh-Baumann, Claudia [Gutachter] / Rössler, Wolfgang [Gutachter] / Devaud, Jean-Marc [Gutachter] / Feldhaar, Heike [Gutachter]

2021

Author's details	Annekathrin Lindenberg [verh. Schubert
Keywords	Tiere (Zoologie) ; Animals (Zoology)
Subject code	sg590
Language	English
Publisher	Universität Würzburg
Publishing place	Würzburg
Document type	Book ; Online ; Thesis
Database	Digital theses on the web

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Article ; Online: Bumblebees are resilient to neonicotinoid-fungicide combinations.

Schuhmann, Antonia / Schulte, Janna / Feldhaar, Heike / Scheiner, Ricarda

Environment international

2024 Volume 186, Page(s) 108608

Abstract: Bumblebees are among the most important wild bees for pollination of crops and securing wildflower diversity. However, their abundance and diversity have been on a steady decrease in the last decades. One of the most important factors leading to their ... ...

Abstract	Bumblebees are among the most important wild bees for pollination of crops and securing wildflower diversity. However, their abundance and diversity have been on a steady decrease in the last decades. One of the most important factors leading to their decline is the frequent use of plant protection products (PPPs) in agriculture, which spread into forests and natural reserves. Mixtures of different PPPs pose a particular threat because of possible synergistic effects. While there is a comparatively large body of studies on the effects of PPPs on honeybees, we still lack data on wild bees. We here investigated the influence of the frequent fungicide Cantus® Gold (boscalid/dimoxystrobin), the neonicotinoid insecticide Mospilan® (acetamiprid) and their combination on bumblebees. Cognitive performance and foraging flights of bumblebees were studied. They are essential for the provisioning and survival of the colony. We introduce a novel method for testing four treatments simultaneously on the same colony, minimizing inter-colony differences. For this, we successfully quartered the colony and moved the queen daily between compartments. Bumblebees appeared astonishingly resilient to the PPPs tested or they have developed mechanisms for detoxification. Neither learning capacity nor flight activity were inhibited by treatment with the single PPPs or their combination.
MeSH term(s)	Bees/drug effects ; Bees/physiology ; Animals ; Neonicotinoids ; Fungicides, Industrial/toxicity ; Strobilurins ; Insecticides/toxicity ; Pyridines/toxicity ; Biphenyl Compounds ; Niacinamide/analogs & derivatives
Chemical Substances	Neonicotinoids ; Fungicides, Industrial ; acetamiprid (5HL5N372P0) ; Strobilurins ; 2-chloro-N-(4-chlorobiphenyl-2-yl)nicotinamide (32MS8ZRD1V) ; Insecticides ; Pyridines ; Biphenyl Compounds ; Niacinamide (25X51I8RD4)
Language	English
Publishing date	2024-03-27
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	554791-x
ISSN	1873-6750 ; 0160-4120
ISSN (online)	1873-6750
ISSN	0160-4120
DOI	10.1016/j.envint.2024.108608
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Article: Pollutants and Their Interaction with Diseases of Social Hymenoptera.

Feldhaar, Heike / Otti, Oliver

Insects

2020 Volume 11, Issue 3

Abstract: Many insect species, including social insects, are currently declining in abundance and diversity. Pollutants such as pesticides, heavy metals, or airborne fine particulate matter from agricultural and industrial sources are among the factors driving ... ...

Abstract	Many insect species, including social insects, are currently declining in abundance and diversity. Pollutants such as pesticides, heavy metals, or airborne fine particulate matter from agricultural and industrial sources are among the factors driving this decline. While these pollutants can have direct detrimental effects, they can also result in negative interactive effects when social insects are simultaneously exposed to multiple stressors. For example, sublethal effects of pollutants can increase the disease susceptibility of social insects, and thereby jeopardize their survival. Here we review how pesticides, heavy metals, or airborne fine particulate matter interact with social insect physiology and especially the insects' immune system. We then give an overview of the current knowledge of the interactive effects of these pollutants with pathogens or parasites. While the effects of pesticide exposure on social insects and their interactions with pathogens have been relatively well studied, the effects of other pollutants, such as heavy metals in soil or fine particulate matter from combustion, vehicular transport, agriculture, and coal mining are still largely unknown. We therefore provide an overview of urgently needed knowledge in order to mitigate the decline of social insects.
Language	English
Publishing date	2020-03-01
Publishing country	Switzerland
Document type	Journal Article ; Review
ISSN	2075-4450
ISSN	2075-4450
DOI	10.3390/insects11030153
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Article: An experimental, behavioral, and chemical analysis of food limitations in mutualistic

Houadria, Mickal Y I / Barone, Giulio / Fayle, Tom M / Schmitt, Thomas / Konik, Petr / Feldhaar, Heike

Ecology and evolution

2023 Volume 13, Issue 2, Page(s) e9760

Abstract: Obligate mutualistic plant-ants are often constrained by their plant partner's capacity to provide resources. However, despite this limitation, some ant partners actively reject potential prey items and instead drop them from the plant rather than ... ...

Abstract	Obligate mutualistic plant-ants are often constrained by their plant partner's capacity to provide resources. However, despite this limitation, some ant partners actively reject potential prey items and instead drop them from the plant rather than consuming them, leaving the ants entirely reliant on host plant-provided food, including that provided indirectly by the symbiotic scale insects that ants tend inside the plants. This dependency potentially increases the efficiency of these ants in defending their host. We hypothesize that if this ant behavior was beneficial to the symbiosis, prey rejection by ants would be observed across multiple plant host species. We also hypothesize that plant-provided food items and symbiotic scale insects from other ant plants should be rejected. We address these hypotheses in the
Language	English
Publishing date	2023-02-07
Publishing country	England
Document type	Journal Article
ZDB-ID	2635675-2
ISSN	2045-7758
ISSN	2045-7758
DOI	10.1002/ece3.9760
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Article ; Online: Ant nutritional ecology: linking the nutritional niche plasticity on individual and colony-level to community ecology.

Feldhaar, Heike

Current opinion in insect science

2014 Volume 5, Page(s) 25–30

Abstract: By contrast to solitary insects, nutrient intake in social insects has additional levels of complexity as foraging workers must not only collect food that meets their own nutritional needs but also that of other colony members such as larvae or ... ...

Abstract	By contrast to solitary insects, nutrient intake in social insects has additional levels of complexity as foraging workers must not only collect food that meets their own nutritional needs but also that of other colony members such as larvae or reproductives that differ in nutritional needs. Current needs of a colony are relayed by a chain of demand from larvae to foragers. Ants are able to regulate nutrient intake to optimize colony-level fitness. Strongly imbalanced food sources can have detrimental effects though. Plasticity in nutritional niche (i.e. the ability to maintain high fitness even when strongly imbalanced diets are collected) may feed back into ant community structure by contributing to the niche of a species, limiting ant abundance and diversity.
Language	English
Publishing date	2014-09-28
Publishing country	Netherlands
Document type	Journal Article ; Review
ZDB-ID	2772833-X
ISSN	2214-5753 ; 2214-5745
ISSN (online)	2214-5753
ISSN	2214-5745
DOI	10.1016/j.cois.2014.09.007
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Article: Invasive

Bieberich, Judith / Müller, Stefanie / Feldhaar, Heike / Lauerer, Marianne

Ecology and evolution

2021 Volume 11, Issue 3, Page(s) 1320–1333

Abstract: Biological invasions are one of the major threats to biodiversity worldwide and contribute to changing community patterns and ecosystem processes. However, it is often not obvious whether an invader is the "driver" causing ecosystem changes or a " ... ...

Abstract	Biological invasions are one of the major threats to biodiversity worldwide and contribute to changing community patterns and ecosystem processes. However, it is often not obvious whether an invader is the "driver" causing ecosystem changes or a "passenger" which is facilitated by previous ecosystem changes. Causality of the impact can be demonstrated by experimental removal of the invader or introduction into a native community. Using such an experimental approach, we tested whether the impact of the invasive plant
Language	English
Publishing date	2021-01-12
Publishing country	England
Document type	Journal Article
ZDB-ID	2635675-2
ISSN	2045-7758
ISSN	2045-7758
DOI	10.1002/ece3.7135
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Article ; Online: Allelochemical run-off from the invasive terrestrial plant Impatiens glandulifera decreases defensibility in Daphnia.

Diller, Jens Georg Peter / Hüftlein, Frederic / Lücker, Darleen / Feldhaar, Heike / Laforsch, Christian

Scientific reports

2023 Volume 13, Issue 1, Page(s) 1207

Abstract: Invasive species are a major threat for native ecosystems and organisms living within. They are reducing the biodiversity in invaded ecosystems, by outcompeting native species with e. g. novel substances. Invasive terrestrial plants can release ... ...

Abstract	Invasive species are a major threat for native ecosystems and organisms living within. They are reducing the biodiversity in invaded ecosystems, by outcompeting native species with e. g. novel substances. Invasive terrestrial plants can release allelochemicals, thereby reducing biodiversity due to the suppression of growth of native plants in invaded habitats. Aside from negative effects on plants, allelochemicals can affect other organisms such as mycorrhiza fungi and invertebrates in terrestrial ecosystems. When invasive plants grow in riparian zones, it is very likely that terrestrial borne allelochemicals can leach into the aquatic ecosystem. There, the often highly reactive compounds may not only elicit toxic effects to aquatic organisms, but they may also interfere with biotic interactions. Here we show that the allelochemical 2-methoxy-1,4-naphthoquinone (2-MNQ), produced by the ubiquitously occurring invasive terrestrial plant Impatiens glandulifera, interferes with the ability of Daphnia to defend itself against predators with morphological defences. Daphnia magna and Daphnia longicephala responded with morphological defences induced by chemical cues released by their corresponding predators, Triops cancriformis or Notonecta sp. However, predator cues in combination with 2-MNQ led to a reduction in the morphological defensive traits, body- and tail-spine length, in D. magna. In D. longicephala all tested inducible defensive traits were not significantly affected by 2-MNQ but indicate similar patterns, highlighting the importance to study different species to assess the risks for aquatic ecosystems. Since it is essential for Daphnia to adapt defences to the current predation risk, a maladaptation in defensive traits when simultaneously exposed to allelochemicals released by I. glandulifera, may therefore have knock-on effects on population dynamics across multiple trophic levels, as Daphnia is a key species in lentic ecosystems.
MeSH term(s)	Animals ; Daphnia ; Ecosystem ; Impatiens ; Pheromones/pharmacology ; Pheromones/chemistry ; Mycorrhizae
Chemical Substances	Pheromones
Language	English
Publishing date	2023-01-21
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-023-27667-4
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Article ; Online: Localisation and identification of polystyrene particles in tissue sections using Raman spectroscopic imaging.

Kniese, Jasmin / Ritschar, Sven / Bünger, Lina / Feldhaar, Heike / Laforsch, Christian / Römpp, Andreas / Schmidt, Heinar

NanoImpact

2023 Volume 30, Page(s) 100465

Abstract: The uptake of microplastic particles (MPP) by organisms is frequently described and poses a potential risk for these organisms and ultimately for humans either through direct uptake or trophic transfer. Currently, the in-situ detection of MPP in ... ...

Abstract	The uptake of microplastic particles (MPP) by organisms is frequently described and poses a potential risk for these organisms and ultimately for humans either through direct uptake or trophic transfer. Currently, the in-situ detection of MPP in organisms is typically based on histological examination of tissue sections after uptake of fluorescently-labelled MPP and is thus not feasible for environmental samples. The alternative approach is purification of MPP from whole organisms or organs by chemical digestion and subsequent spectroscopic detection (FT-IR or Raman). While this approach is feasible for un-labelled particles it goes along with loss of any spatial information related to the location in the tissue. In our study we aimed at providing a workflow for the localisation and identification of non-fluorescent and fluorescent polystyrene (PS) particles (fragments, size range 2-130 μm) in tissue sections of the model organism Eisenia fetida with Raman spectroscopic imaging (RSI). We provide methodological approaches for the preparation of the samples, technical parameters for the RSI measurements and data analysis for PS differentiation in tissue sections. The developed approaches were combined in a workflow for the in-situ analysis of MPP in tissue sections. The spectroscopic analysis requires differentiation of spectra of MPP and interfering compounds, which is challenging given the complexity of tissue. Therefore, a classification algorithm was developed to differentiate PS particles from haem, intestinal contents and surrounding tissue. It allows the differentiation of PS particles from protein in the tissue of E. fetida with an accuracy of 95%. The smallest PS particle detected in the tissue was 2 μm in diameter. We show that it is possible to localise and identify non-fluorescent and fluorescent ingested PS particles directly in tissue sections of E. fetida in the gut lumen and the adjacent tissue.
MeSH term(s)	Humans ; Polystyrenes/analysis ; Plastics/analysis ; Spectroscopy, Fourier Transform Infrared ; Microplastics ; Spectrum Analysis, Raman
Chemical Substances	Polystyrenes ; Plastics ; Microplastics
Language	English
Publishing date	2023-04-28
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	2452-0748
ISSN (online)	2452-0748
DOI	10.1016/j.impact.2023.100465
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Book ; Online ; Thesis: Saproxylic insects in tree hollows

Schauer, Bastian [Verfasser] / Feldhaar, Heike [Akademischer Betreuer]

drivers of diversity, dispersal and food web structure

2022

Author's details	Bastian Schauer ; Betreuer: Heike Feldhaar
Keywords	Naturwissenschaften ; Science
Subject code	sg500
Language	English
Publisher	Universität Bayreuth
Publishing place	Bayreuth
Document type	Book ; Online ; Thesis
Database	Digital theses on the web

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Article ; Online: Pollutants and Their Interaction with Diseases of Social Hymenoptera

Heike Feldhaar / Oliver Otti

Insects, Vol 11, Iss 3, p

2020 Volume 153

Abstract	Many insect species, including social insects, are currently declining in abundance and diversity. Pollutants such as pesticides, heavy metals, or airborne fine particulate matter from agricultural and industrial sources are among the factors driving this decline. While these pollutants can have direct detrimental effects, they can also result in negative interactive effects when social insects are simultaneously exposed to multiple stressors. For example, sublethal effects of pollutants can increase the disease susceptibility of social insects, and thereby jeopardize their survival. Here we review how pesticides, heavy metals, or airborne fine particulate matter interact with social insect physiology and especially the insects’ immune system. We then give an overview of the current knowledge of the interactive effects of these pollutants with pathogens or parasites. While the effects of pesticide exposure on social insects and their interactions with pathogens have been relatively well studied, the effects of other pollutants, such as heavy metals in soil or fine particulate matter from combustion, vehicular transport, agriculture, and coal mining are still largely unknown. We therefore provide an overview of urgently needed knowledge in order to mitigate the decline of social insects.
Keywords	disease susceptibility ; fine particulate matter ; heavy metal ; pesticide ; social insect ; Science ; Q
Subject code	300
Language	English
Publishing date	2020-03-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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