Search results for "organs"
showing 10 items of 2730 documents
Protected areas enhance expanding populations and mitigate declines on range edges under climate change
2018
Warming climate is changing geographical distributions of species. However, keeping pace with the climate may be complicated. The climate is indeed changing faster than species are capable of following it. Other environmental changes can hamper the ability of species to move if they face difficulties following climatic preferences in a fragmented landscape. This may lead to increased extinction risk especially for species inhabiting high latitudes and altitudes. These species are expected to be particularly exposed to the consequences of climate change due to the lack of space into which they can retreat. Evidence is mounting that this may indeed be the case, since boreal and montane specie…
Susceptibility of European freshwater fish to climate change: species profiling based on life-history and environmental characteristics
2018
Climate change is expected to strongly affect freshwater fish communities. Combined with other anthropogenic impacts, it will influence species distributions, and contribute to population declines and local extinctions. To provide timely management and conservation, it is important to identify those species that will be most impacted by climate change and those that will be resilient. Species traits are considered as a promising source of information on characteristics that influence resilience to various environmental conditions and impacts. We collated life history traits and climatic niches of all European freshwater fish species and compared those identified as susceptible to climate ch…
Figure S2 from Species' ecological functionality alters the outcome of fish stocking success predicted by a food-web model
2018
Changes in the adult whitefish biomasses in response to increased whitefish stocking (Wht250 [light blue]; Wht300 [black]; Wht350 [dark blue]) compared to the whitefish baseline (Wht200 [light gray]). Dashed lines indicate the time point when fishing was introduced to the simulations.
Figure S2 from Species' ecological functionality alters the outcome of fish stocking success predicted by a food-web model
2018
Changes in the adult whitefish biomasses in response to increased whitefish stocking (Wht250 [light blue]; Wht300 [black]; Wht350 [dark blue]) compared to the whitefish baseline (Wht200 [light gray]). Dashed lines indicate the time point when fishing was introduced to the simulations.
Aerosol properties, source identification, and cloud processing in orographic clouds measured by single particle mass spectrometry on a Central Europ…
2015
Abstract. Cloud residues and out-of-cloud aerosol particles with diameters between 150 and 900 nm have been analysed by on-line single particle aerosol mass spectrometry during the six-week study HCCT-2010 in September/October 2010. The measurement location was the mountain Schmücke (937 m a.s.l.) in Central Germany. More than 170 000 bipolar mass spectra from out-of-cloud aerosol particles and more than 14 000 bipolar mass spectra from cloud residual particles were obtained and were classified using a fuzzy c-means clustering algorithm. Analysis of the uncertainty of the sorting algorithm was conducted on a subset of the data by comparing the clustering output with particle-by-particle ins…
Development and Initial Validation of the Humor Climate in Sport Scale Running Head: Humor climate in sport
2021
In sport teams, humor is an essential element that influences communication processes, and plays an important role in group dynamics. Despite this, no current instrument is presented in the literature to measure humor climate in sport teams. Therefore, the current study presents the development and initial validation of the Humor Climate in Sport Scale (HCSS). The aim was to assess content, structural and concurrent validity of the developed instrument, and to examine differential item functioning (DIF) as a function of sex. Three different phases were completed in this study. The first phase involved focus groups (n = 5) that explored humor as communication in a team sport context. In phas…
Ocular Phenotype of Relaxin Gene Knockout (Rln-/-) Mice
2020
Purpose: To test if relaxin deficiency affects ocular structure and function we investigated expression of relaxin (Rln) and RXFP receptors (Rxfp1, Rxfp2), and compared ocular phenotypes in relaxin gene knockout (Rln−/− ) and wild type (Rln+/+ ) mice. Materials and Methods: Rln, Rxfp1 and Rxfp2 mRNA expression was detected in ocular tissues of Rln+/+ mice using RT-PCR. The eyes of 11 Rln−/− and 5 Rln+/+ male mice were investigated. Corneal and retinal thickness was assessed using optical coherence tomography. Intraocular pressure was measured using a rebound tonometer. Retinal, choroidal and sclera morphology and thickness were evaluated histologically. Eyes were collected and fixed for imm…
The influence of storage method on the transparency of pig crystalline lens
2019
ABSTRACT Purpose: The porcine eye is frequently used as a research model. This paper analyzes the effect of different storage methods on the transparency of pig crystalline lens. Methods: A spectral transmission curve (from 220 to 780 nm) for the crystalline lens was determined experimentally after storage in different conditions: saline solution, formalin, castor oil, and freezing at -80°C. The total transmission in the visible spectrum, which was used as an index of transparency, was calculated from these curves. For comparative purposes, fresh lenses were evaluated and used as controls. Results: Storing the porcine crystalline lens in saline solution or castor oil resulted in a transpare…
Measurements of anterior chamber depth, white-to-white distance, anterior chamber angle, and pupil diameter using two Scheimpflug imaging devices
2018
Purpose: To compare the ocular anterior chamber depth, white-to-white distance, anterior chamber angle, and pupil diameter, as measured with two different Scheimpflug imaging devices. Methods: This transversal study included 80 right eyes from 80 subjects aged from 20 to 40 years. Their spherical equivalents ranged from -4.25 to +1.00 diopters (D). Each eye's anterior chamber depth, white-to-white distance, anterior chamber angle, and pupil diameter, were measured for far vision using both the Galilei G4 (double Scheimpflug camera) and the Pentacam HR (single Scheimpflug camera) systems. Results: Mean anterior chamber depths were calculated as 3.12 ± 0.23 mm and 3.19 ± 0.24 mm when measured…
Toxic microalgae and global change : why have proliferations increased along the Mediterranean coast?
2021
The ocean and the continent converge in a very narrow line that is, nonetheless, truly relevant to the health, leisure, and economy of our society. The Mediterranean coastline has undergone major changes over the last fifty years, which is evident in the alteration of its microalgae species. The proliferation of dinoflagellates is now common in microscopic organism communities in this ecosystem as a result of the modifications caused by humans and climate change. The increased frequency with which toxic microalgae blooms are detected has been key to raising awareness of this change.