General landscape

Cross section of a general landscape showing topography.

Mt. Tremblant -- Catsk

Map drawn with oil based pastels on brown craft paper.

Jamaica - Bahamas: unfinished

[drawn by Erwin Raisz].

Santiago -- Buenos Aires

[drawn by Erwin Raisz].

China N-S

[drawn by Erwin Raisz].

S. Africa

[drawn by Erwin Raisz].

Mesocosm experiment on warming and acidification effects on phytoplankton composition and cell size

While the isolated responses of marine phytoplankton to climate warming and to ocean acidification have been studies intensively, studies on the combined effect of both aspects of Global Change are still scarce. Therefore, we performed a mesocosm experiment with a factorial combination of temperature (9 and 15°C) and pCO2 (560 ppm and 1400 ppm) with a natural autumn plankton community from the western Baltic Sea. Temporal trajectories of total biomass and of the biomass of the most important higher taxa followed similar patterns in all treatments. When averaging over the entire time course, phytoplankton biomass decreased with warming and increased with CO2 under warm conditions. The contribution of the two dominant higher phytoplankton taxa (diatoms and cryptophytes) and of the 4 most important species (3 diatoms, 1 cryptophyte) did not respond to the experimental treatments. Taxonomic composition of phytoplankton showed only responses at the level of subdominant and rare species. Phytoplankton cell sizes increased with CO2 addition and decreased with warming. Both effects were stronger for larger species. Warming effects were stronger than CO2 effects and tended to counteract each other. Phytoplankton communities without calcifying species and exposed to short-term variation of COO2 seem to be rather resistant to ocean acidification.

Forest insect and disease conditions in the southwestern region /

"R3" cover.

Exercicio de perfeccion, y virtudes christianas /

Mode of access: Internet.

Collection académique composée des mémoires, actes ou journaux des plus célébres académies [et] sociétés littéraires, des extraits des meilleurs ouvrages périodiques, des traités particuliers [et] des piéces fugitives les plus rares : concernant l'histoire naturelle et la botanique, la physique expérimentale et la chymie, la médecine et l'anatomie ; tome huitiéme de la partie étrangere, contenant les Mémories abrégés de l'Academie Royale de Prusse /

Mode of access: Internet.

Histoire de l'Academie Royale des Sciences : année MDCCXIV, avec les memoires de mathematique & de physique, pour la même année, tirés des registres de cette Academie

Mode of access: Internet.

Storia naturale, generale e particolare /

Mode of access: Internet.

Augustinus sui interpres in explicanda gratia creaturae innocenti necessaria ad bene agendum dissertatio /

Mode of access: Internet.

La estrella carpentana : vida de la sierva de Dios Maria de la Cabeza ... /

Mode of access: Internet.

Les avantures de Monsieur Robert Chevalier, dit de Beauchêne, capitaine de flibustiers dans la nouvelle France /

Mode of access: Internet.