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Przejdź do strony domowej biblioteki Pedagogiczna Biblioteka Wojewódzka im. Komisji Edukacji Narodowej w Lublinie Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaPedagogiczna Biblioteka Wojewódzka im. Komisji Edukacji Narodowej w Lublinie
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    Wyświetlanie 1-7 z 7
    Tytuł:
    Long-term nitrogen deposition reduces the diversity of nitrogen-fixing plants
    Autorzy:
    Lenoir, Jonathan
    Reyes-Mendez, Evelin Y.
    Orczewska, Anna
    Heinken, Thilo
    Reczyńska, Kamila
    Jha, Rohit Raj
    Van Calster, Hans
    Schmidt, Wolfgang
    Verheyen, Kris
    Guralnick, Robert P.
    Decocq, Guillaume
    Świerkosz, Krzysztof
    Folk, Ryan
    Berki, Imre
    Schei, Fride Høistad
    Brunet, Jörg
    Moreno-García, Pablo
    Petřík, Petr
    Máliš, František
    Liu, Yu
    Bernhardt-Römermann, Markus
    De Frenne, Pieter
    Naaf, Tobias
    Standovár, Tibor
    Kopecký, Martin
    Chudomelová, Markéta
    Hédl, Radim
    Baeten, Lander
    Waller, Donald M.
    Becker-Scarpitta, Antoine
    Teleki, Balázs
    Macek, Martin
    Grytnes, John-Arvid
    Closset, Deborah
    Montaño-Centellas, Flavia
    Li, Daijiang
    Stachurska-Swakoń, Alina
    Vild, Ondřej
    Gilliam, Frank S.
    Jaroszewicz, Bogdan
    Opis:
    Biological nitrogen fixation is a fundamental part of ecosystem functioning. Anthropogenic nitrogen deposition and climate change may, however, limit the competitive advantage of nitrogen-fixing plants, leading to reduced relative diversity of nitrogen-fixing plants. Yet, assessments of changes of nitrogen-fixing plant long-term community diversity are rare. Here, we examine temporal trends in the diversity of nitrogen-fixing plants and their relationships with anthropogenic nitrogen deposition while accounting for changes in temperature and aridity. We used forest-floor vegetation resurveys of temperate forests in Europe and the United States spanning multiple decades. Nitrogen-fixer richness declined as nitrogen deposition increased over time but did not respond to changes in climate. Phylogenetic diversity also declined, as distinct lineages of N-fixers were lost between surveys, but the “winners” and “losers” among nitrogen-fixing lineages varied among study sites, suggesting that losses are context dependent. Anthropogenic nitrogen deposition reduces nitrogen-fixing plant diversity in ways that may strongly affect natural nitrogen fixation.
    Dostawca treści:
    Repozytorium Uniwersytetu Jagiellońskiego
    Artykuł
    Tytuł:
    Spirostomum teres: A Long Term Study of an Anoxic-Hypolimnion Population Feeding upon Photosynthesizing Microorganisms
    Autorzy:
    Macek, Miroslav
    Sánchez Medina, Ximena
    Picazo, Antonio
    Peštová, Dana
    Bautista Reyes, Fernando
    Montiel Hernández, Jorge Ricardo
    Alcocer, Javier
    Merino Ibarra, Martín
    Camacho, Antonio
    Tematy:
    Spirostomum teres
    ciliate
    population dynamics
    maar lake
    anoxic hypolimnion
    picocyanobacteria
    feeding rate
    Pokaż więcej
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Powiązania:
    https://bibliotekanauki.pl/articles/52089923.pdf  Link otwiera się w nowym oknie
    Opis:
    The pelagic / anoxic hypolimnion population of Spirostomum teres was investigated as a part of the long-term ciliates’ monitoring (2003–2016) in an oligo- to mesotrophic monomictic hyposaline crater lake Alchichica (Puebla / Veracruz, Mexico), including an analysis of picoplankton (both heterotrophic, HPP and autotrophic, APP) and inorganic compounds of nitrogen (ammonium, nitrite, nitrate), phosphorus (dissolved reactive phosphorus, DRP) and silicon. Additionally, detailed studies of the ciliate vertical distribution and feeding activity measured upon fluorescently labelled APP (picocyanobacteria) were carried out. The results were compared with those from a neighbour freshwater crater lake La Preciosa and with a meromictic karstic lake La Cruz (Cuenca, Spain). The ciliate vertical distribution within the water column was very well defined: During the first decade, the benthic population was frequently found throughout a developing stratification of the lake. The established stratification of the lake turned the conditions favourable for the formation of an oxycline / hypolimnion population, typically, several meters below the deep chlorophyll maximum (formed basically by diatoms); the population preferred the layers without detectable dissolved oxygen. However, an observed gradient of light (PAR) could support both oxygenic and anoxygenic photosynthesis. Late stratification after deepening of the thermocline reduced the layers with S. teres population to a minimum apparently due to the drastic change in physicochemical conditions within a metalimnion, coupled with an oxycline, and limited to 1 to 2 meters; microstratification was found. Last years, the very bottom population disappeared or it was reduced and the late stratification S. teres peaks were smaller or did not appeared. Generally, S. teres oxycline / anoxic hypolimnion population was observed from June through November. Optimum picoplankton numbers in conditions that supported the ciliate growth were found: The ciliate was peaking at APP of 0.6 to 1 × 105 cells mL–1; the optimum of HPP was observed round 1.4 × 106 cells mL–1. S. teres was efficiently feeding upon picocyanobacteria in numbers of 105 cells mL–1 reaching the clearance rate of 2000 nL cell–1h–1, which represented in average 130 to 210 cells cell–1h–1 ingested. Feeding upon purple sulphur bacteria was observed but only during the end of the lake stable stratification when the ciliate population was already dropping. On the other hand, the volume specific clearance of S. teres upon picocyanobacteria (103 h–1) did not support the hypothesis that they could serve as a sole prey. Feeding upon eukaryote phytoplankton (chlorophytes Monoraphidium minutum, diatoms Cyclotella choc tawhatcheeana) could be of higher importance that previously supposed. Additionally, a use of ingested and retained photosynthetic prokaryotes is hypothesized.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Beyond the "Code" : a Guide to the description and documentation of biodiversity in ciliated protists (Alveolata, Ciliophora)
    Autorzy:
    Shao, Chen
    Lipscomb, Diana
    Al-Farraj, Saleh A.
    Luporini, Pierangelo
    Gupta, Renu
    Pérez-Uz, Blanca
    Aescht, Erna
    Agatha, Sabine
    Clamp, John C.
    Wiąckowski, Krzysztof
    Kamra, Komal
    Odhiambo Ong'ondo, Geoffrey
    Martín-Cereceda, Mercedes
    Xu, Kuidong
    Makhija, Seema
    Day, John G.
    Carr, Martin
    Warren, Alan
    Rotterová, Johana
    Ma, Honggang
    Lin, Xiaofeng
    Wu, Lei
    Montagnes, David J. S.
    Gao, Shan
    Wang, Mei
    Yi, Zhenzhen
    Fan, Yangbo
    Patterson, David J.
    Macek, Miroslav
    Quintela-Alonso, Pablo
    Al-Rasheid, Khaled
    Nikolaeva, Svetlana
    Purushothaman, Jasmine
    Dunthorn, Micah
    Langlois, Gaytha
    Lynn, Denis H.
    Song, Weibo
    McMiller, Nettie
    Vallesi, Adriana
    Shi, Xinlu
    El-Serehy, Hamed A.
    Dellinger, Marc
    Mansergh, Robert I.
    Al-Quraishy, Saleh
    Stoeck, Thorsten
    Hu, Xiaozhong
    Weisse, Thomas
    La Terza, Antonietta
    Lobban, Christopher S.
    Shen, Zhuo
    Achilles-Day, Undine E. M.
    Mackenzie-Dodds, Jacqueline
    Gong, Jun
    Zufall, Rebecca
    Santoferrara, Luciana
    Gao, Feng
    Opis:
    Recent advances in molecular technology have revolutionized research on all aspects of the biology of organisms, including ciliates, and created unprecedented opportunities for pursuing a more integrative approach to investigations of biodiversity. However, this goal is complicated by large gaps and inconsistencies that still exist in the foundation of basic information about biodiversity of ciliates. The present paper reviews issues relating to the taxonomy of ciliates and presents specific recommendations for best practice in the observation and documentation of their biodiversity. This effort stems from a workshop that explored ways to implement six Grand Challenges proposed by the International Research Coordination Network for Biodiversity of Ciliates (IRCN-BC). As part of its commitment to strengthening the knowledge base that supports research on biodiversity of ciliates, the IRCN-BC proposes to populate "The Ciliate Guide", an online database, with biodiversity-related data and metadata to create a resource that will facilitate accurate taxonomic identifications and promote sharing of data.
    Dostawca treści:
    Repozytorium Uniwersytetu Jagiellońskiego
    Artykuł
      Wyświetlanie 1-7 z 7

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