Alkenone data of sediment core GeoB9508-5 from the continental slope off Senegal

In order to investigate a possible link between tropical Northeast (NE) Atlantic sea-surface temperature (SST), Atlantic meridional overturning circulation (AMOC), and drought in the Sahel during the past 44 thousand years (kyr) we used alkenone paleothermometry and d13C of C. wuellerstorfi of a marine sediment core from the continental slope off Senegal. Our data show periods of low SST and reduced AMOC that coincided with drought in the Sahel during North Atlantic Heinrich stadials (HS). The coldest period was HS1 (ca. 15-18 kyr before present, BP) when SST decreased by more than 2°C. Moreover, the SST off Senegal lagged variations in Sahel aridity, which is in agreement with results from a freshwater hosing experiment. We conclude that variations in tropical NE Atlantic SST were not the initial trigger of millennial-scale Sahel droughts of the past 44 kyr. Instead, it is thought that these droughts were induced by substantial coolings of the extratropical North Atlantic.

Die französische Kolonie Ober-Senegal und Niger.

"Sonderabdruck aus 'Mitteilungen aus den deutschen Schutzgebieten', Bd. 30, Heft 4."

Histoire naturelle du Senegal : Coquillages. Avec la relation abrége d'un voyage fait en ce pays, pendant les années 1749, 50, 51, 52 & 53 /

Contiene: Voyage au Senegal, p. [1]-190. Histoire des coquillages, p. [I]-XCVI. Coquillages, p. [1]-269. Table alphabetique des matieres contenues dans ce volume, p. 270-275.

A treatise on the synochus atrabiliosa, a contagious fever : wich raged at Senegal in the year 1778, and proved fatal to the greatest part of the europeans, and to a number of the natives : to which is prefixed, a Journal of the Weather during the Prevalence of that disease ...: and annexed to it, a short reflexion on the gum trade of Senegal, and the importance of the place on that account /

Mode of access: Internet.

Oeconomical and medical observations, in two parts : from the year 1758 to the year 1763, inclusive : tending to the improvement of military hospitals, and to the cure of camp diseases, incident to soldiers : to which is subjoined, an appendix, containing a curious account of the climate and diseases in Africa, upon the great river Senegal, and farther up than the island of Senegal : in a letter form Mr. Boone, practitioner in physic to that Garrison for three years, to Dr. Brocklesby /

Mode of access: Internet.

[Fullam] Memorial Bench (between Library and Angell Hall) donated by Acacia Fraternity

On verso: donated by Acacia Fraternity (UM - ... Papers, 1929)

Die Senegal- und oberen Nigerlander /

Thesis (Ph.D.)--Albertus Universitat zu Konigsberg in Pr., 1885.

Une mission au Senegal; ethnographic, botanique, zoologie, geologie.

At head of title: Exposition Universelle de 1900 - Les colonies francaises.

A voyage to Senegal ; or, historical, philosophical, and political memoirs, relative to the discoveries ... of Europeans in the Atlantic Ocean ... to which is added an account of a journey from Isle St. Louis to Galam

by J. P. L. Durand

Gut content analysis to distinguish between seed feeding and mycophagy of a biphyllid beetle larva found on Acacia melanoxylon

In a search for potential biocontrol agents for Acacia melanoxylon R. Br. (Mimosaceae), larvae of the beetle Diplocoelus dilataticollis Lea (Coleoptera; Biphyllidae) were found within damaged seeds of A. melanoxylon. The gut contents of larvae and adults were examined to determine whether their diet included seeds, in apparent contradiction to the known mycophagous diet of members of this family of beetles. Calcofluor M2R White, a plant cell-wall staining optical brightener was used to differentiate between plant cell fragments and fungal tissue in the gut content smears. Gut contents of adults of a known seed predator of A. melanoxylon, a weevil of the genus Melanterius, were examined in the same way to provide a benchmark. The gut contents of D. dilataticollis differed from those of Melanterius sp. Fungal structures and microbes were found in the gut of D. dilataticollis, in contrast to plant cell fragments found in the gut of the weevil and from scrapes made directly from seeds. We conclude that larvae of D. dilataticollis feed primarily on fungi associated with damaged seed and therefore may not be the proximate cause of seed damage.

Isolation and characterization of microsatellite loci from Acacia nilotica ssp. indica (Mimosaceae)

Five microsatellite loci are presented for prickly acacia, Acacia nilotica ssp. indica (Benth.) Brenan, an introduced weed of national significance in Australia. These microsatellite loci were obtained through the construction of an enriched library and their use will enable us to determine the genetic origin and extent of genetic diversity of this weed in Australia.

Enrichment, isolation and characterisation of ruminal bacteria that degrade non-protein amino acids from the tropical legume Acacia angustissima

Acacia angustissima has been proposed as a protein supplement in countries where low quality forages predominate. A number of non-protein amino acids have been identified in the leaves of A. angustissima and these have been linked to toxicity in ruminants. The non-protein amino acid 4-n-acetyl-2,4-diaminobutyric acid (ADAB) has been shown to be the major amino acid in the leaves of A. angustissima. The current study aimed to identify micro-organisms from the rumen environment capable of degrading ADAB by using a defined rumen-simulating media with an amino acid extract from A. angustissima. A mixed enrichment culture was obtained that exhibited substantial ADAB-degrading ability. Attempts to isolate an ADAB-degrading micro-organism were carried out, however no isolates were able to degrade ADAB in pure culture. This enrichment culture was also able to degrade the non-protein amino acids diaminobutyric acid (DABA) and diaminopropionic acid (DAPA) which have structural similarities to ADAB. Two isolates were obtained which could degrade DAPA. One isolate is a novel Grain-positive rod (strain LPLR3) which belongs to the Firmicutes and is not closely related to any previously isolated bacterium. The other isolate is strain LPSR1 which belongs to the Gammaproteobacteria and is closely related (99.93% similar) to Klebsiella pneumoniae subsp. ozaenae. The studies demonstrate that the rumen is a potential rich source of undiscovered micro-organisms which have novel capacities to degrade plant secondary compounds. (c) 2005 Elsevier B.V. All rights reserved.