Search results for "pioneer"
showing 10 items of 21 documents
Experimentally induced community assembly of polypores reveals the importance of both environmental filtering and assembly history
2019
The community assembly of wood-inhabiting fungi follows a successional pathway, with newly emerging resource patches being colonised by pioneer species, followed by those specialised on later stages of decay. The primary coloniser species have been suggested to strongly influence the assembly of the later-arriving community. We created an artificial resource pulse and studied the assembly of polypores over an 11yr period to ask how the identities of the colonising species depend on the environmental characteristics and the assembly history of the dead wood unit. Our results support the view that community assembly in fungi is a highly stochastic process, as even detailed description of the …
Biodiversity change after climate-induced ice-shelf collapse in the Antarctic
2011
Julian Gutt ... et al. -- 10 pages, 5 figures, 1 table, supplementary data https://doi.org/10.1016/j.dsr2.2010.05.024
The structure of ant assemblages in an urban area of Helsinki, southern Finland
2008
We collected ants in ten replicated habitat types of an urban island and described their assemblages using Non-metric Multidimensional Scaling and Multivariate Regression Trees. Lasius niger was the most abundant species, followed by Myrmica rubra, Formica fusca, L. flavus and L. platythorax; these species comprised 87% of all 1133 nests of the 16 species found. Ant assemblages changed gradually from open habitats to sites with closed tree canopy. Species most tolerant to urban pressure were L. niger, L. flavus and M. rugulosa, whereas forest-associated species were scarce or absent. Successful urban species had extensive (Palaearctic) or more limited (Euro-Siberian) distribution. Common an…
Plants assemble species specific bacterial communities from common core taxa in three arcto-alpine climate zones
2017
Evidence for the pivotal role of plant-associated bacteria to plant health and productivity has accumulated rapidly in the last years. However, key questions related to what drives plant bacteriomes remain unanswered, among which is the impact of climate zones on plant-associated microbiota. This is particularly true for wild plants in arcto-alpine biomes. Here, we hypothesized that the bacterial communities associated with pioneer plants in these regions have major roles in plant health support, and this is reflected in the formation of climate and host plant specific endophytic communities. We thus compared the bacteriomes associated with the native perennial plants Oxyria digyna and Saxi…
Strong regionality and dominance of anaerobic bacterial taxa characterize diazotrophic bacterial communities of the arcto-alpine plant species Oxyria…
2017
Arctic and alpine biomes are most often strongly nitrogen-limited, and hence biological nitrogen fixation is a strong driver of these ecosystems. Both biomes are characterized by low temperatures and short growing seasons, but they differ in seasonality of solar radiation and in soil water balance due to underlying permafrost in the Arctic. Arcto-alpine plant species are well-adapted to the low temperatures that prevail in their habitats, and plant growth is mainly limited by the availability of nutrients, in particular nitrogen, due to slow mineralization. Nitrogen fixing bacteria are likely important for plant growth in these habitats, but very little is known of these bacteria or forces …
Review of imaging network activities in developing rodent cerebral cortex in vivo
2016
The combination of voltage-sensitive dye imaging (VSDI) with multielectrode array (MEA) recordings in the rodent cerebral cortex in vivo allows the simultaneous analysis of large-scale network interactions and electrophysiological single-unit recordings. Using this approach, distinct patterns of spontaneous and sensory-evoked activity can be recorded in the primary somatosensory (S1) and motor cortex (M1) of newborn rats. Already at the day of birth, gamma oscillations and spindle bursts in the barrel cortex synchronize the activity of a local columnar ensemble, thereby generating an early topographic representation of the sensory periphery. During the first postnatal week, both cortical ac…
Neuvosto-Viron pioneerijärjestön ja Suomen Demokratian Pioneerien Liiton kanssakäyminen liennytyksestä Prahan kevääseen
2011
Tutkielmassa käsitellään Neuvosto-Viron pioneerijärjestön ja Suomen Demokratian Pioneerien Liiton (SDPL) välisiä suhteita vuosina 1955–1968. Työn keskeisin kysymys koskee sitä, minkälaista ideologista sekä toiminnallista kanssakäymistä oli Neuvosto-Viron pioneerijärjestön ja Suomen Demokratian Pioneerien Liiton välillä. Ja ennen kaikkea mitä kanssakäymisellä haettiin sekä minkälaisiin tuloksiin lopulta päästiin? Tutkimuksessa haetaan myös vertailevilla ja lähdekriittisillä tutkimusmenetelmillä vastausta kysymykseen, millaisia eroja tai yhtäläisyyksiä oli poliittisesti vastakkaisiin leireihin kuuluneiden maiden pioneerijärjestöjen toimintojen ja toimintaperiaatteiden välillä. Oliko pioneeris…
Effects of overabundant nitrate and warmer temperatures on charophytes: The roles of plasticity and local adaptation
2018
Global change effects, such as warming and increases in nitrogen loading, alter vulnerable Mediterranean aquatic systems, and charophytes can be one of the most affected groups. We addressed the possible interaction between these factors on two populations of the cosmopolitan charophytes Chara hispida and Chara vulgaris. Populations were taken from two different environments, a nitrate-poor mountain lake and a nitrate-rich Mediterranean coastal spring. The laboratory experiment had a 2 × 2 factorial design based on two nitrate levels (similar to and double the local conditions) and two temperatures. Increased temperatures favoured the growth of the four populations, but an increase in nitra…
La presència de dones pioneres europees en el camp psicològic
2019
espanolEn este trabajo se revisa la participacion de mujeres pioneras europeas en el campo psicologico, con el objetivo de analizar su aportacion al desarrollo de la disciplina, a lo largo del siglo xx y principios del xxi. Para ello, de las fuentes de la bibliografia que ofrece Benjamin, en 1980, se han seleccionado siete mujeres nacidas en Europa, en el siglo xix. Y a partir de una metodologia bibliometrica se ha examinado la informacion del Social Sciences Citation Index, –ssci–, desde 1900 hasta 2016. Los resultados indican que las pioneras mujeres europeas, psicoanalistas, psiquiatras y psicologas, han obtenido un alto numero de citas a lo largo del tiempo. Los temas en que sus obras a…
Design and use of a Facebook 4 Urban Facelifts
2015
The renewal of the 'urban look' (Urban Facelift) could play a crucial role for the development of the whole city. This study will analyse the case of the Palermo port area, which is considered as the 'face' of the city. Sicily is indeed an island, and therefore, because of its natural and infrastructural features, the sea is still its main connection with the world. For this reason, urban renovation in the city of Palermo has begun first with its coastal area. The tested methodology combines future urban faces with the present–state evaluation criteria by involving different stakeholders. Then, the urban faces are associated with possible and suitable future scenarios. In this way, an Urban…