Poster Session 4

You are here

Poster Session 4

Wednesday 10 February 2021 | 15:10-16:00 hrs


LINK TO ZOOM MEETING: Will Follow soon.


15:10 – 15:15 Introduction by the session hosts
15:15 – 15:18 Adult sex ratio and dung beetle, Onthophagus taurus: Implications of altered ASR on individual offspring development
Sudeshna Chakraborty @ Komdeur Group, University of Groningen

Adult Sex Ratio (ASR) is an evolutionarily significant factor that impacts varied aspects of animal societies. In dung beetles, altered ASR is known to influence mating and parental investment. With biparental investment, bigger brood balls are produced which contribute directly to the fitness of the offspring. Here, we tested if these effects translate to individual developmental path of the offspring. Preliminary results show early instar larvae in female-biased condition were heavier but no difference was observed during the later stages. Additionally, emergence time of females was comparatively shorter in this condition. These demonstrate the direct impact of external social factors on development.
15:19 – 15:22 Inter- and intraspecific differences in clonal expansion strategies of dune grasses Elytrigia juncea and Ammophila arenaria
Carlijn Lammers @ Coastal Systems, Royal Netherlands Institute for Sea Research (NIOZ)

Coastal dune development is dependent on colonization by clonal vegetation. For dune grasses, the number, density and spatial organization of shoots determines their dune-building capacity. Recently, it was found that sediment deposition causes a change in the spatial expansion strategy of Ammophila arenaria, which suggests that shoot organization may be an indicator of environmental conditions. In a survey along the Northwestern European coast, the inter- and intraspecific differences in the spatial shoot organization of Elytrigia juncea and Ammophila arenaria were determined. The differences in growth strategies and their relation to environmental conditions will be presented.
15:23 – 15:26 Habitat Selection of Black-headed Gulls Breeding in the Dutch Wadden Sea
Shuiqing He @ Conservation Ecology, University of Groningen

Habitat selection is of great importance in the fate of individuals, the structure and dynamics of ecosystems, and also the evolution and diversity of life. The research species in this study is a most wildly seen opportunistic gull species in the Netherlands, the black-headed gull. In this study, GPS- UHF tracking collar was used for remote detection of the positions of 11 individuals, including 4 males and 7 females who failed in their breeding during the breeding season in 2019 on Griend, the Netherlands. We want to mainly figure out (1) if the tidal cycle can affect the habitat selection of the black-headed gulls in the Wadden Sea, and (2) if they show different habitat selection behavior between two different breeding statuses, which is before and after breeding failure. Hypotheses were made that it shows a regular habitat selection in response to the daily tidal cycle and that difference can be shown between two different breeding statuses. We used the random selection function (RSF) fitting with integrated nested Laplace approximations (INLA) to analyze their preference value for different habitats. The result shows that this species prefers to go to the emerged areas in response to the daily tidal cycle, and the regularity can be more distinctly shown in the intertidal area. The selection preference for most habitats remain similar between before and after breeding failure, however, a difference can be shown in several habitats during the high tide.
15:27 – 15:30 A comparative analysis of the impact of management measures on lion populations across four national parks in Kenya
Monica Mumbi Chege @ Institute of Environmental Sciences, Leiden University

The lion (Panthera leo melanochaita) population in Kenya has declined due to anthropogenic activities and retaliatory killings resulting from human-lion conflicts. Targeted management actions are required to perpetuate the population. Our study aims to investigate the influence of selected management interventions on lion populations in Lake Nakuru, Meru, Nairobi and Amboseli National Parks. Specifically we will investigate the impact of park size, fencing and previous translocations on: 1) lion population density/structure and genetic composition, 2) lion spatio-temporal habitat use/resource selection and, 3) human-lion conflict dynamics through meta-barcoding of lion scat to determine the proportion of livestock in the lion’s diet.
15:31 – 15:34 The effect of legume proportion on grassland productivity and nitrous oxide emissions
Arlete Simoes Barneze @ Lancaster University & Wageningen University

Grass-legume mixtures are commonly cultivated to increase grassland productivity while reducing N-fertilisation. However, little is known about the effect of this on greenhouse gas (GHG) emissions. The aim was to investigate interactions between the proportion of legumes in grass-legume mixtures and N-fertiliser addition on productivity and GHG emissions. We hypothesised that an increase in the relative proportion of legumes would increase plant productivity and decrease GHG emissions. In a controlled experiment one grass and one legume species were grown in mixtures in different proportions. Above-ground productivity was greater in legume-grass mixtures, with no effect of legume proportion on N2O emissions.
15:35 – 16:00 Breakout rooms Q&A session with individual poster pitchers (one breakout room for each poster pitcher)
16:00 Back to plenary conference room