--- cited_by: - publication: /report/nca3/chapter/southeast publication_type: chapter reference: /reference/204a45ba-2f11-48f2-82e0-8075379b0a7d - publication: /report/nca3 publication_type: report reference: /reference/204a45ba-2f11-48f2-82e0-8075379b0a7d - publication: /report/usgcrp-climate-human-health-assessment-2016/chapter/water-related-illnesses/finding/seasonal-geographic-changes-waternborne-illness-risk publication_type: finding reference: /reference/204a45ba-2f11-48f2-82e0-8075379b0a7d - publication: /report/usgcrp-climate-human-health-assessment-2016/chapter/water-related-illnesses publication_type: chapter reference: /reference/204a45ba-2f11-48f2-82e0-8075379b0a7d - publication: /report/usgcrp-climate-human-health-assessment-2016 publication_type: report reference: /reference/204a45ba-2f11-48f2-82e0-8075379b0a7d 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: - display_name: 'NCA3 Chapter 17: Southeast and the Caribbean' reference: /reference/204a45ba-2f11-48f2-82e0-8075379b0a7d relationship: cito:isCitedBy uri: /report/nca3/chapter/southeast - display_name: 'Climate Change Impacts in the United States: The Third National Climate Assessment' reference: /reference/204a45ba-2f11-48f2-82e0-8075379b0a7d relationship: cito:isCitedBy uri: /report/nca3 - display_name: "Finding 6.1 of 'The Impacts of Climate Change on Human Health in the United States: A Scientific Assessment'" reference: /reference/204a45ba-2f11-48f2-82e0-8075379b0a7d relationship: cito:isCitedBy uri: /report/usgcrp-climate-human-health-assessment-2016/chapter/water-related-illnesses/finding/seasonal-geographic-changes-waternborne-illness-risk - display_name: "Chapter 6: Climate Impacts on Water-Related Illnesses (in 'The Impacts of Climate Change on Human Health in the United States: A Scientific Assessment')" reference: /reference/204a45ba-2f11-48f2-82e0-8075379b0a7d relationship: cito:isCitedBy uri: /report/usgcrp-climate-human-health-assessment-2016/chapter/water-related-illnesses - display_name: 'The Impacts of Climate Change on Human Health in the United States: A Scientific Assessment' reference: /reference/204a45ba-2f11-48f2-82e0-8075379b0a7d relationship: cito:isCitedBy uri: /report/usgcrp-climate-human-health-assessment-2016 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