29 research outputs found

    New data to the earthworm fauna of Israel (Oligochaeta, Lumbricidae)

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    Elaborating several smaller earthworm samples collected in different parts of Israel resulted in recording 20 earthworm species including Bimastos parvus (Eisen, 1874) a North American peregrine which represents new record for the country. Three other species; Dendrobaena nevoi Csuzdi & Pavlíček, 1999, Healyella jordanis (Csuzdi & Pavlíček, 1999)and Perelia shamsi Csuzdi & Pavlíček, 2005 were first recorded after their original descriptions. The present list of lumbricidearthworms recorded for Israel is raised to 28

    A New Subspecies of the Genus Ormyrus (Hymenoptera, Ormyridae) and New Species of the Genus Idiomacromerus (Hymenoptera, Torymidae) from Israel

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    Ormyrus gratiosus hermonicus Zerova, subsp. n. (type locality: Mount Hermon) and Idiomacromerus mirabilis Zerova, sp. n. (type locality: Mount Carmel) from northern Israel are described.Описаны Ormyrus gratiosus hermonicus Zerova, subsp. n. (типовая местность: г. Хермон) и Idiomacromerus mirabilis Zerova, sp. n. (типовая местность: г. Кармел) из северного Израиля

    New Records of Yponomeutoid Moths (Lepidoptera, Yponomeutidae, Plutellidae) from Israel

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    Ten species of moths belonging to families Plutellidae and Yponomeutidae are newly recorded from Israel: Yponomeuta albonigratus Gershenson, Y. cagnagellus (Hübner), Y. meridionalis Gershenson, Kessleria saxifragae (Stainton), Ypsolopha asperella (Linnaeus), Y. dentella (Fabricius), Y. instabilella Mann, Y. mucronella (Scopoli), Y. persicella (Fabricius), and Plutella porrectella (Linnaeus). The majority of these species were collected at the “Evolution Canyon”, Lower Nahal Oren, Mt. Carmel, Israel.Впервые для фауны Израиля указаны 10 видов молей из семейств Plutellidae и Yponomeutidae: Ypo-nomeuta albonigratus Gershenson, Y. cagnagellus (Hubner), Y. meridionalis Gershenson, Kessleria saxifragae (Stainton), Ypsolopha asperella (Linnaeus), Y. dentella (Fabricius), Y. instabilella Mann, Y. mucronella (Scopoli), Y. persicella (Fabri-cius), and Plutella porrectella (Linnaeus). Большинство видов собрано в «Evolution Canyon», Нижний Нахал Орен, г. Кармел, Израиль

    Scorpion Biodiversity and Interslope Divergence at “Evolution Canyon”, Lower Nahal Oren Microsite, Mt. Carmel, Israel

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    BACKGROUND: Local natural laboratories, designated by us as the "Evolution Canyon" model, are excellent tools to study regional and global ecological dynamics across life. They present abiotic and biotic contrasts locally, permitting the pursuit of observations and experiments across diverse taxa sharing sharp microecological subdivisions. Higher solar radiation received by the "African savannah-like" south-facing slopes (AS) in canyons north of the equator than by the opposite "European maquis-like" north-facing slopes (ES) is associated with higher abiotic stress. Scorpions are a suitable taxon to study interslope biodiversity differences, associated with the differences in abiotic factors (climate, drought), due to their ability to adapt to dry environments. METHODOLOGY/PRINCIPAL FINDINGS: Scorpions were studied by the turning stone method and by UV light methods. The pattern observed in scorpions was contrasted with similar patterns in several other taxa at the same place. As expected, the AS proved to be significantly more speciose regarding scorpions, paralleling the interslope patterns in taxa such as lizards and snakes, butterflies (Rhopalocera), beetles (families Tenebrionidae, Dermestidae, Chrysomelidae), and grasshoppers (Orthoptera). CONCLUSIONS/SIGNIFICANCE: Our results support an earlier conclusion stating that the homogenizing effects of migration and stochasticity are not able to eliminate the interslope intra- and interspecific differences in biodiversity despite an interslope distance of only 100 m at the "EC" valley bottom. In our opinion, the interslope microclimate selection, driven mainly by differences in insolance, could be the primary factor responsible for the observed interslope pattern

    Growth and Asymmetry of Soil Microfungal Colonies from “Evolution Canyon,” Lower Nahal Oren, Mount Carmel, Israel

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    Fluctuating asymmetry is a contentious indicator of stress in populations of animals and plants. Nevertheless, it is a measure of developmental noise, typically obtained by measuring asymmetry across an individual organism's left-right axis of symmetry. These individual, signed asymmetries are symmetrically distributed around a mean of zero. Fluctuating asymmetry, however, has rarely been studied in microorganisms, and never in fungi.We examined colony growth and random phenotypic variation of five soil microfungal species isolated from the opposing slopes of “Evolution Canyon,” Mount Carmel, Israel. This canyon provides an opportunity to study diverse taxa inhabiting a single microsite, under different kinds and intensities of abiotic and biotic stress. The south-facing “African” slope of “Evolution Canyon” is xeric, warm, and tropical. It is only 200 m, on average, from the north-facing “European” slope, which is mesic, cool, and temperate. Five fungal species inhabiting both the south-facing “African” slope, and the north-facing “European” slope of the canyon were grown under controlled laboratory conditions, where we measured the fluctuating radial asymmetry and sizes of their colonies. from the “African” slope were more asymmetric than those from the “European” slope.Our study suggests that fluctuating radial asymmetry has potential as an indicator of random phenotypic variation and stress in soil microfungi. Interaction of slope and species for both growth rate and asymmetry of microfungi in a common environment is evidence of genetic differences between the “African” and “European” slopes of “Evolution Canyon.

    Is Evolution of Blind Mole Rats Determined by Climate Oscillations?

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    The concept of climate variability facilitating adaptive radiation supported by the ‘‘Court Jester’’ hypothesis is disputed by the ‘‘Red Queen’’ one, but the prevalence of one or the other might be scale-dependent. We report on a detailed, comprehensive phylo-geographic study on the ,4 kb mtDNA sequence in underground blind mole rats of the family Spalacidae (or subfamily Spalacinae) from the East Mediterranean steppes. Our study aimed at testing the presence of periodicities in branching patterns on a constructed phylogenetic tree and at searching for congruence between branching events, tectonic history and paleoclimates. In contrast to the strong support for the majority of the branching events on the tree, the absence of support in a few instances indicates that network-like evolution could exist in spalacids. In our tree, robust support was given, in concordance with paleontological data, for the separation of spalacids from muroid rodents during the first half of the Miocene when open, grass-dominated habitats were established. Marine barriers formed between Anatolia and the Balkans could have facilitated the separation of the lineage ‘‘Spalax’’ from the lineage ‘‘Nannospalax’’ and of the clade ‘‘leucodon’’ from the clade ‘‘xanthodon’’. The separation of the clade ‘‘ehrenbergi’’ occurred during the late stages of the tectonically induced uplift of the Anatolian high plateaus and mountains, whereas the separation of the clade ‘‘vasvarii’’ took place when the rapidly uplifting Taurus mountain range prevented the Mediterranean rainfalls from reaching the Central Anatolian Plateau. The separation of Spalax antiquus and S. graecus occurred when the southeastern Carpathians were uplifted. Despite the role played by tectonic events, branching events that show periodicity corresponding to 400-kyr and 100-kyr eccentricity bands illuminate the important role of orbital fluctuations on adaptive radiation in spalacids. At the given scale, our results supports the ‘‘Court Jester’’ hypothesis over the ‘‘Red Queen’’ one

    The contribution of insects to global forest deadwood decomposition

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    The amount of carbon stored in deadwood is equivalent to about 8 per cent of the global forest carbon stocks. The decomposition of deadwood is largely governed by climate with decomposer groups—such as microorganisms and insects—contributing to variations in the decomposition rates. At the global scale, the contribution of insects to the decomposition of deadwood and carbon release remains poorly understood. Here we present a field experiment of wood decomposition across 55 forest sites and 6 continents. We find that the deadwood decomposition rates increase with temperature, and the strongest temperature effect is found at high precipitation levels. Precipitation affects the decomposition rates negatively at low temperatures and positively at high temperatures. As a net effect—including the direct consumption by insects and indirect effects through interactions with microorganisms—insects accelerate the decomposition in tropical forests (3.9% median mass loss per year). In temperate and boreal forests, we find weak positive and negative effects with a median mass loss of 0.9 per cent and −0.1 per cent per year, respectively. Furthermore, we apply the experimentally derived decomposition function to a global map of deadwood carbon synthesized from empirical and remote-sensing data, obtaining an estimate of 10.9 ± 3.2 petagram of carbon per year released from deadwood globally, with 93 per cent originating from tropical forests. Globally, the net effect of insects may account for 29 per cent of the carbon flux from deadwood, which suggests a functional importance of insects in the decomposition of deadwood and the carbon cycle
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