| 1. |
- Dickel, Lisa, et al.
(författare)
-
Characterization of habitat requirements of European fishing spiders
- 2022
-
Ingår i: PeerJ. - : PEERJ INC. - 2167-8359. ; 10
-
Tidskriftsartikel (refereegranskat)abstract
- Wetlands are among the most threatened habitats in the world, and so are their species, which suffer habitat loss due to climate and land use changes. Freshwater species, and especially arthropods, receive comparatively little attention in conservation plans, and the goals to stop and reverse the destruction of wetlands published 25 years ago in a manifesto by the Union of Concerned Scientists have not been reached. In this study, we investigated the occurrence and habitat requirements at two spatial scales of two species of European fishing spiders Dolomedes, which rely heavily on declining wetland habitats in Sweden and southern Norway. We collected occurrence data for Dolomedes plantarius and Dolomedes fimbriatus, using a live-determination method. We modelled the placement of nursery webs to describe fine-scale habitat requirements related to vegetation and micro-climate. Using a machine learning approach, we described the habitat features for each species and for co-occurrence sites, thus providing insight into variables relevant for the presence and detectability of Dolomedes. Nursery placement is mostly dependent on proximity to water, presence of Carex sp. (Sedges) and crossing vegetation structures, and on humidity, while detection can be affected by weather conditions. Furthermore, co-occurrence sites were more similar to D. plantarius sites than to D. fimbriatus sites, whereby surrounding forest, water type and velocity, elevation and latitude were of importance for explaining which species of Dolomedes was present. Overall, habitat requirements were narrower for D. plantarius compared to D. fimbiratus.
|
|
| 2. |
- Rotberg, Fiona J. Y.
(författare)
-
Social Networks, Brokers, and Climate Change Adaptation : a Bangladeshi Case
- 2013
-
Ingår i: Journal of International Development. - : Wiley. - 0954-1748 .- 1099-1328. ; 25:5, s. 599-608
-
Tidskriftsartikel (refereegranskat)abstract
- Social Network Theory is suggested as a theoretical frame within the context of adaptation to climate change. Two elements of the theory that prove useful are that network brokers bridge networks and diffuse novel information that helps lead to group innovation. Novel information is needed for adaptation to climate change. Network data from a Bangladeshi community exemplify how a rural network functions during non-climate variable and climate variable times; which actors comprise the network and that brokers inside and outside the network diffuse information for possible adaptation.
|
|
| 3. |
|
|
| 4. |
|
|
| 5. |
- Mojica Benavides, Martin, 1983, et al.
(författare)
-
An Optical Tweezers, Epi-Fluorescence/Spinning disk confocal- and microfluidic-setup for synchronization studies of glycolytic oscillations in living yeast cells
- 2016
-
Ingår i: Proceedings SPIE 9922, Optical Trapping and Optical Micromanipulation XIII. San Diego; USA. 28 August -1 September 2016. - : SPIE. - 9781510602359
-
Konferensbidrag (refereegranskat)abstract
- Due to the significant importance of glycolytic oscillations studies and the recent breakthroughs on single cell analysis, a further interest arrives with intracellular and intercellular responses. Understanding cell-cell communication can give insight to oscillatory behaviors in biological systems, such as insulin secretion from pancreatic beta-cells. The aim of this work consists on the manipulation of living yeast cells to study propagation and synchronization of induced glycolytic oscillations. A setup, consisting of an optical tweezers system and microfluidic devices coupled with fluorescence imaging was designed to perform a time dependent observation during artificially induced glycolytic oscillations. Multi-channel flow devices and diffusion chambers were fabricated using soft lithography. Automatized pumps controlled specific flow rates of infused glucose and cyanide solutions, used to induce the oscillations. Flow and diffusion in the microfluidic devices were simulated to assure experimentally the desired coverage of the solutions across the yeast cells, a requirement for time dependent measurements. Using near infrared optical tweezers, yeast cells were trapped and positioned in array configurations, ranging from a single cell to clusters of various symmetries, in order to obtain information about cell-cell communications during the metabolic cycles. Confocal illumination of an entire focal plane using a spinning disk, will allow acquirement of NADH periodic fluorescence signals during glycolytic oscillations. This method permits an improvement of the 2D projection images obtained with wide field microscopy to a tomographic description of the subcellular propagation of the oscillations.
|
|
| 6. |
|
|
| 7. |
|
|
