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Chemical Settlement Cues

Corals procreate through planktonic planula larvae that can actively swim in the water column until they settle on a suitable substrate and undergo metamorphosis to become a coral polyp and eventually a new coral colony.

Finding the right spot for settlement is essential for larvae of sessile organisms. Chemical cues play a major role in the settlement process. Only when we understand the basic processes and gain better knowledge about the origin and the operating modes of these chemical cues, predictions about how these chemical signals may change in the future can be made.

 

Publications:

·         Kitamura, M., Schupp, P. J., Nakano, Y., & Uemura, D. (2009). Luminaolide, a novel metamorphosis-enhancing macrodiolide for scleractinian coral larvae from crustose coralline algae. Tetrahedron letters, 50(47), 6606-6609.

·         Maru, N., Inuzuka, T., Yamamoto, K., Kitamura, M., Schupp, P. J., Yamada, K., & Uemura, D. (2013). Relative configuration of luminaolide. Tetrahedron Letters, 54(33), 4385-4387.

·         Kitamura, M., Koyama, T., Nakano, Y., & Uemura, D. (2007). Characterization of a natural inducer of coral larval metamorphosis. Journal of experimental marine biology and ecology, 340(1), 96-102.

·         Tebben, J., Motti, C. A., Siboni, N., Tapiolas, D. M., Negri, A. P., Schupp, P. J., Kitamura,M., Hatta,M. & Harder, T. (2015). Chemical mediation of coral larval settlement by crustose coralline algae. Scientific reports, 5

 

Conference/ Symposium

·         Möller, M., Nietzer, S., Kitamura, M., Schupp, P. (2015) Natural inducers for larval metamorphosis in scleractinian corals; 5th Coral Reef Ecology Symposium, Bremen

·         Schupp, P.J., Möller, M., Nietzer, S. & Kitamura, M. (2015) Natural Inducers for Larval Metamorphosis in Scleractinian Corals; The 9th European Conference on Marine Natural Products, 2015 Glasgow


See Mareen Möller

See Makoto Kitamura


Adaptability of juvenile corals

Corals are sensitive to heat stress. Rising seawater temperatures are a major threat to coral reefs and lead to massive beaching events worldwide. Adult corals have a small range of temperature tolerance, however we know that diverse reefs exist in areas with naturally high temperatures.

Juvenile organisms often have a higher plasticity than the adults. During their juvenile stages, environmental factors can influence the underlying genetic programs and cause an adaptive response.  Juvenile corals growing up under elevated temperatures might have the ability to adapt to a new thermal range due to genetic or symbiotic changes. In long-term experiments with juvenile corals of different species we assess this ability to potentially adapt to elevated temperatures within one lifecycle.     

Publication: research still ongoing

See Samuel Nietzer

See Mareen Möller

Sedimentation

Sedimentation due to construction or coastal runoff can be a lethal stressor for corals. Scientific studies have mainly addressed the impact on adult corals and embryogenesis.  In a recent study, we could show that juvenile corals are much more sensitive to sedimentation stress than adult corals. Sediment loads that are considered to be too low to influence adult corals can be fatal for juveniles.  The results obtained in this study should be taken into consideration for sediment management plans.

Publication

·         Möller, M., Nietzer, S., Schils,T. Schupp, P. (2016) Low sediment loads affect survival of coral recruits: the first weeks are crucial, Coral reefs

Conference/ Symposium

·         Möller, M., Nietzer, S., Schils,T. Schupp, P.(2016) Juvenile corals are affected by low sedimentation rates: the first weeks are crucial, 13th International Coral Reef Symposium, Honolulu

·         Nietzer, S., Möller, M., Kitamura, M. Schupp, P. (2015) The effect of sedimentation on the early life stages of scleractinian corals 5th Coral Reef Ecology Symposium, Bremen

 

See Samuel Nietzer

See Mareen Möller

Coral reproduction

Experimental work on juvenile corals usually requires large numbers of coral recruits. We established low-tech methods for maximum output of coral recruits for scientific projects, reef restoration and possibly the ornamental trade. Our methods could significantly reduce negative impacts on local reefs and allow sustainable subsistence farming of scleractinians for the aquarium trade.

 

Publications:

·         Nietzer, S. (2016) Korallenzucht Sensationelle Fortschritte; Koralle Meerwasseraquaristik Fachmagazin 

·         http://www.korallenriff.de/artikel/1763_Koralle_100_ab_29.07._im_Handel.htmlNietzer, S. (2016) Korallenfarm 2.0 geschlechtliche Nachzucht; Koralle Meerwasseraquaristik Fachmagazin

 

Conference/ Symposium

·         Nietzer, S., Moeller, M., Schupp, P. (2016) Leptastrea purpurea: a possible model organism for coral reproduction an physiology

·         Nietzer, S. (2016) Nachhaltige Korallenzucht: Möglichkeiten für die Aquaristik  durch sexuelle Korallenvermehrung; 9. Internationales Meerwasser-Symposium, Lünen

·         Nietzer, S. (2016) Sexuelle Korallenvermehrung, Aquarienfreunde Wilhelmshaven

·         Nietzer, S. (2016) Neue Möglichkeiten der sexuelle Korallenvermehrung; Fisch und Reptil, Sindelfingen

 

See Samuel Nietzer

See Mareen Möller

 

ICBM-Webmaster (Stand: 10.09.2018)