--- articles: - contributors: - display_name: 'Author : Jon E. Keeley (United States Geological Survey Western Ecological Research Center) ' href: http://52.38.26.42:8080/contributor/15859.yaml id: 15859 organization: country_code: US display_name: United States Geological Survey Western Ecological Research Center identifier: usgs-western-ecological-research-center name: United States Geological Survey Western Ecological Research Center organization_type_identifier: federal type: organization url: http://www.werc.usgs.gov/ organization_uri: /organization/usgs-western-ecological-research-center person: display_name: Jon E. Keeley first_name: Jon E. id: 3030 last_name: Keeley middle_name: ~ orcid: ~ type: person url: http://www.werc.usgs.gov/keeley person_id: 3030 person_uri: /person/3030 role_type_identifier: author uri: /contributor/15859 - display_name: 'Author : Jon E. Keeley (University of California, Los Angeles Department of Ecology and Evolutionary Biology) ' href: http://52.38.26.42:8080/contributor/17790.yaml id: 17790 organization: country_code: US display_name: 'University of California, Los Angeles Department of Ecology and Evolutionary Biology' identifier: university-california-los-angeles-department-ecology-evolutionary-biology name: 'University of California, Los Angeles Department of Ecology and Evolutionary Biology' organization_type_identifier: academic type: organization url: https://www.eeb.ucla.edu/ organization_uri: /organization/university-california-los-angeles-department-ecology-evolutionary-biology person: display_name: Jon E. Keeley first_name: Jon E. id: 3030 last_name: Keeley middle_name: ~ orcid: ~ type: person url: http://www.werc.usgs.gov/keeley person_id: 3030 person_uri: /person/3030 role_type_identifier: author uri: /contributor/17790 - display_name: 'Author : Teresa J. Brennan (United States Geological Survey Western Ecological Research Center) ' href: http://52.38.26.42:8080/contributor/17789.yaml id: 17789 organization: country_code: US display_name: United States Geological Survey Western Ecological Research Center identifier: usgs-western-ecological-research-center name: United States Geological Survey Western Ecological Research Center organization_type_identifier: federal type: organization url: http://www.werc.usgs.gov/ organization_uri: /organization/usgs-western-ecological-research-center person: display_name: Teresa J. Brennan first_name: Teresa J. id: 3031 last_name: Brennan middle_name: ~ orcid: ~ type: person url: ~ person_id: 3031 person_uri: /person/3031 role_type_identifier: author uri: /contributor/17789 description: ~ display_name: Fire-driven alien invasion in a fire-adapted ecosystem doi: 10.1007/s00442-012-2253-8 files: [] href: http://52.38.26.42:8080/article/10.1007/s00442-012-2253-8.yaml identifier: 10.1007/s00442-012-2253-8 journal_identifier: oecologia journal_pages: 1043-1052 journal_vol: 169 notes: ~ parents: [] references: [] title: Fire-driven alien invasion in a fire-adapted ecosystem type: article uri: /article/10.1007/s00442-012-2253-8 url: ~ year: 2012 - contributors: - display_name: 'Author : Claudia Wiedner ' href: http://52.38.26.42:8080/contributor/5165.yaml id: 5165 organization: ~ organization_uri: ~ person: display_name: Claudia Wiedner first_name: Claudia id: 3026 last_name: Wiedner middle_name: ~ orcid: ~ type: person url: ~ person_id: 3026 person_uri: /person/3026 role_type_identifier: author uri: /contributor/5165 - display_name: 'Author : Jacqueline Rücker ' href: http://52.38.26.42:8080/contributor/5166.yaml id: 5166 organization: ~ organization_uri: ~ person: display_name: Jacqueline Rücker first_name: Jacqueline id: 3027 last_name: Rücker middle_name: ~ orcid: ~ type: person url: ~ person_id: 3027 person_uri: /person/3027 role_type_identifier: author uri: /contributor/5166 - display_name: 'Author : Rainer Brüggemann ' href: http://52.38.26.42:8080/contributor/5167.yaml id: 5167 organization: ~ organization_uri: ~ person: display_name: Rainer Brüggemann first_name: Rainer id: 3028 last_name: Brüggemann middle_name: ~ orcid: ~ type: person url: ~ person_id: 3028 person_uri: /person/3028 role_type_identifier: author uri: /contributor/5167 - display_name: 'Author : Brigitte Nixdorf ' href: http://52.38.26.42:8080/contributor/5168.yaml id: 5168 organization: ~ organization_uri: ~ person: display_name: Brigitte Nixdorf first_name: Brigitte id: 3029 last_name: Nixdorf middle_name: ~ orcid: ~ type: person url: ~ person_id: 3029 person_uri: /person/3029 role_type_identifier: author uri: /contributor/5168 description: 'Cylindrospermopsis raciborskii, an invasive freshwater cyanobacterium, originated from the tropics but has spread to temperate zones over the last few decades. Its northernmost populations in Europe occur in North German lakes. How such dramatic changes in its biogeography are possible and how its population dynamics in the newly invaded habitats are regulated are still unexplained. We therefore conducted a long-term (1993-2005) study of two German lakes to elucidate the mechanisms behind C. raciborskii population dynamics and to identify the abiotic constraints on its development. Our data revealed that pelagic populations of C. raciborskii thrived for three months during the summer, contributing up to 23% of the total cyanobacteria biovolume. Population sizes varied greatly between years without exhibiting any distinct long-term trends. In the annual lifecycle,C. raciborskii filaments emerged in the pelagic habitat when the temperature rose above 15-17 degC. At that time, mean photosynthetically active radiation in the mixed water column (Imix) overstepped its maximum. Rates of population net increase were highest at the beginning of the season (0.15-0.28 day[?]1), declined continuously over time, and were significantly positively correlated with Imix. This indicates that the onset of the pelagic population is temperature-mediated and that Imix controls its growth. Since Imix peaks before the population onset, the time of germination is of crucial importance for successful development. To test this hypothesis, we designed a model to simulate pelagic population size, starting at different dates in the annual cycle. Moving the population onset forward by 30 days resulted in a doubling of the population size. We therefore conclude that an earlier rise in water temperature associated with climate change has promoted the spread of C. raciborskii to the temperate zone. Earlier warming permits earlier germination, thereby shifting the pelagic populations to a phase with higher Imix, which advances growth and the population establishment. ' display_name: Climate change affects timing and size of populations of an invasive cyanobacterium in temperate regions doi: 10.1007/s00442-007-0683-5 files: [] href: http://52.38.26.42:8080/article/10.1007/s00442-007-0683-5.yaml identifier: 10.1007/s00442-007-0683-5 journal_identifier: oecologia journal_pages: 473-484 journal_vol: 152 notes: ~ parents: [] references: [] title: Climate change affects timing and size of populations of an invasive cyanobacterium in temperate regions type: article uri: /article/10.1007/s00442-007-0683-5 url: ~ year: 2007 cited_by: [] contributors: [] country: ~ description: ~ display_name: Oecologia files: - display_name: 00442.jpg file: /sgw/journals/medium/00442.jpg href: https://images.springer.com/sgw/journals/medium/00442.jpg identifier: 5a4a74db-7bea-4475-a0a0-a1baab2da54f landing_page: ~ location: https://images.springer.com mime_type: image/jpeg sha1: 32e5af8cd50dd67f90d50fac9cd3e54df01c127b size: 65155 thumbnail: 76/60/3643c015efae04997bb17bcddcb8/.thumb-5a4a74db-7bea-4475-a0a0-a1baab2da54f.png thumbnail_href: http://data.globalchange.gov/assets/76/60/3643c015efae04997bb17bcddcb8/.thumb-5a4a74db-7bea-4475-a0a0-a1baab2da54f.png type: file uri: /file/5a4a74db-7bea-4475-a0a0-a1baab2da54f url: https://images.springer.com/sgw/journals/medium/00442.jpg href: http://52.38.26.42:8080/journal/oecologia.yaml identifier: oecologia notes: ~ online_issn: 1432-1939 parents: [] print_issn: 0029-8549 publisher: Springer references: [] title: Oecologia type: journal uri: /journal/oecologia url: http://www.springer.com/life+sciences/ecology/journal/442