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Complexity is increasingly the hallmark in environmental management practices of sandy shorelines. This arises primarily from meeting growing public demands (e.g., real estate, recreation) whilst reconciling economic demands with expectations of coastal users who have modern conservation ethics. Ideally, shoreline management is underpinned by empirical(More)
C R E D IT : A L B E R T O P O M A R E S /I S T O C K P H O T O .C O M Methane from the East Siberian Arctic Shelf IN THEIR REPORT “EXTENSIVE METHANE VENTing to the atmosphere from sediments of the East Siberian Arctic Shelf ” (5 March, p. 1246), N. Shakhova et al. write that methane (CH 4 ) release resulting from thawing Arctic permafrost “is a likely(More)
Tourism has long been considered as a 'clean industry' with almost no negative effects on the environment. This study demonstrated, in two different coastal systems (Mediterranean and Baltic), that tourism related activities are particularly affecting the sandy beach meio- and nematofauna in the upper beach zone, the specific ecotone in which many meiofauna(More)
The effect of oscillatory movement of single legs (about C-B axis) on compensatory eyestalk reactions and on leg counterforce as normally produced by substrate tilt has been investigated with the legs at different states of flexion (M-C joint) and leg-to-body orientation (T-C joint). Eye response and force reaction released by standard C-B movement increase(More)
Within the framework of the MEDCORE project on the ecology and management of Mediterranean coastal areas we decided to include the local dissemination of scientific results in Tunisia. The involvement of a local public school, and the joint work of local teachers and of local and international researchers, was chosen as a dissemination method because of the(More)
1. Substrate tilting consistently elicits both an eyestalk response and a resistance reaction by the legs in the spiny lobsterPalinurus vulgaris. 2. These two responses differ from each other in terms of their phaso-tonic form, frequency response and strength of bilateral linkage. 3. Changing the relationship between imposed leg movement and the force of(More)
The role of development in current neo-Darwinian evolutionary theory is still underestimated. Only a few experimental and theoretical efforts have been made to bridge the gap, among which the theories of genetic assimilation, stabilising selection and autopoiesis. The relationship between the organism and its environment is a focal point for understanding(More)
Littoral sandhoppers perform zonal orientation mainly by means of sun orientation, which in Mediterranean populations was shown to be inborn, associated with a genetically determined directional tendency adapted to the shoreline of each population. In case of changes of the shoreline the genetic heterogeneity of populations and learning ability may(More)
Tilting of the animal with respect to gravity results in compensatory eyestalk movements and in leg counterforce reactions which vary with the number and sequential position of legs touching the body-fixed substrate board (Figs. 2, 3). The gravity response is reduced with increasing number of legs touching the substrate. The results fit an interpretation(More)
a r t i c l e i n f o Ghar El Melh is a shallow lagoon (average depth of 0.8 m) that has undergone a eutrophication process due to growing human pressures. To obtain a global frame of the ecosystem functioning, an optical and an ecological classification were used in parallel. Downwelling and upwelling spectral irradiances were measured in situ in 22(More)