Cryptic Lineages of Little Free-Tailed Bats,Chaerephon pumilus(Chiroptera: Molossidae) from Southern Africa and the Western Indian Ocean Islands

2009 ◽  
Vol 44 (1) ◽  
pp. 55-70 ◽  
Author(s):  
Peter John Taylor ◽  
Jennifer Lamb ◽  
Devendran Reddy ◽  
Theshnie Naidoo ◽  
Fanja Ratrimomanarivo ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Southern Africa ◽  
Western Indian Ocean ◽  
Ocean Islands

Cryptic lineages of little free-tailed bats,Chaerephon pumilus(Chiroptera: Molossidae) from southern Africa and the western Indian Ocean islands

2009 ◽  
Vol 44 (1) ◽  
pp. 55-70
Author(s):  
Peter John Taylor ◽  
Jennifer Lamb ◽  
Devendran Reddy ◽  
Theshnie Naidoo ◽  
Fanja Ratrimomanarivo ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Southern Africa ◽  
Western Indian Ocean ◽  
Ocean Islands

History and management - Southern Africa and western Indian Ocean islands.

2018 ◽  
pp. 264-286
Author(s):  
L. W. Strathie ◽  
A. J. McConnachie
Keyword(s):  
Indian Ocean ◽  
Southern Africa ◽  
Western Indian Ocean ◽  
Ocean Islands

scholarly journals Madagascar corals reveal a multidecadal signature of rainfall and river runoff since 1708

2013 ◽  
Vol 9 (2) ◽  
pp. 641-656 ◽  
Author(s):  
C. A. Grove ◽  
J. Zinke ◽  
F. Peeters ◽  
W. Park ◽  
T. Scheufen ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Southern Africa ◽  
River Runoff ◽  
Decadal Variability ◽  
Rainfall Variability ◽  
Western Indian Ocean ◽  
Phase Changes ◽  
Monsoon Circulation ◽  
Eastern Australia ◽  
Instrumental Records

Abstract. Pacific Ocean sea surface temperatures (SST) influence rainfall variability on multidecadal and interdecadal timescales in concert with the Pacific Decadal Oscillation (PDO) and Interdecadal Pacific Oscillation (IPO). Rainfall variations in locations such as Australia and North America are therefore linked to phase changes in the PDO. Furthermore, studies have suggested teleconnections exist between the western Indian Ocean and Pacific Decadal Variability (PDV), similar to those observed on interannual timescales related to the El Niño Southern Oscillation (ENSO). However, as instrumental records of rainfall are too short and sparse to confidently assess multidecadal climatic teleconnections, here we present four coral climate archives from Madagascar spanning up to the past 300 yr (1708–2008) to assess such decadal variability. Using spectral luminescence scanning to reconstruct past changes in river runoff, we identify significant multidecadal and interdecadal frequencies in the coral records, which before 1900 are coherent with Asian-based PDO reconstructions. This multidecadal relationship with the Asian-based PDO reconstructions points to an unidentified teleconnection mechanism that affects Madagascar rainfall/runoff, most likely triggered by multidecadal changes in North Pacific SST, influencing the Asian Monsoon circulation. In the 20th century we decouple human deforestation effects from rainfall-induced soil erosion by pairing luminescence with coral geochemistry. Positive PDO phases are associated with increased Indian Ocean temperatures and runoff/rainfall in eastern Madagascar, while precipitation in southern Africa and eastern Australia declines. Consequently, the negative PDO phase that started in 1998 may contribute to reduced rainfall over eastern Madagascar and increased precipitation in southern Africa and eastern Australia. We conclude that multidecadal rainfall variability in Madagascar and the western Indian Ocean needs to be taken into account when considering water resource management under a future warming climate.

scholarly journals Climatology of the Mascarene High and Its Influence on Weather and Climate over Southern Africa

Climate ◽  
2020 ◽  
Vol 8 (7) ◽  
pp. 86 ◽  
Author(s):  
Nkosinathi G. Xulu ◽  
Hector Chikoore ◽  
Mary-Jane M. Bopape ◽  
Nthaduleni S. Nethengwe
Keyword(s):  
Indian Ocean ◽  
Southern Africa ◽  
Lower Troposphere ◽  
Western Indian Ocean ◽  
Vital Role ◽  
Tropical Cyclone Genesis ◽  
Trade Winds ◽  
Mascarene High ◽  
Weather And Climate ◽  
Cyclone Genesis

Globally, subtropical circulation in the lower troposphere is characterized by anticyclones over the oceans. Subtropical anticyclones locate over subtropical belts, modulating weather and climate patterns in those regions. The Mascarene High is an anticyclone located over the Southern Indian Ocean and has a vital role in weather and climate variability over Southern Africa. The warm Western Indian Ocean is a major source of moisture for the subcontinent also permitting tropical cyclone genesis. In this study, we review the dynamics of the Mascarene High, its interactions with the ocean, and its impact on weather and climate over Southern Africa. We also review studies on the evolution of subtropical anticyclones in a future warmer climate. The links between SST modes over the Indian Ocean and the strengthening and weakening of the Mascarene High have been demonstrated. One important aspect is atmospheric blocking due to the Mascarene High, which leads to anomalous rainfall and temperature events over the subcontinent. Blocking leads to landfall of tropical cyclones and slow propagation of cut-off lows resulting in severe weather and flooding over the subcontinent. Understanding how expansion of the Mascarene High due to warming will alter trade winds and storm tracks and change the mean climate of Southern Africa is crucial.

Two new species of Trevathana (Crustacea, Cirripedia, Balanomorpha, Pyrgomatidae) from the Western Indian Ocean and French Polynesia

Zootaxa ◽  
2009 ◽  
Vol 2116 (1) ◽  
pp. 46-52 ◽  
Author(s):  
YAIR ACHITUV ◽  
YAAKOV LANGZAM
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Western Indian Ocean ◽  
French Polynesia ◽  
Terra Incognita ◽  
Two New Species ◽  
The Indian Ocean ◽  
Basal Margin ◽  
Ocean Islands

Two new species of the Pyrgomatid barnacle Trevathana are described: Trevathana synthesysae nov. sp., extracted from Plesiastrea versipora from the Indian Ocean Islands Réunion and Mauritius, and Trevathana isfae nov. sp. from a colony of Favia stelligera from French Polynesia, which, until recently, was terra incognita with regard to coral-inhabiting barnacles. The two new species are distinctive by their relatively broad scutum as compared to Trevathana dentatum, their prominent adductor ridge extending beyond the basal margin of the scutum, and their quadrangular tergum.

scholarly journals Leptospirosis in the western Indian Ocean islands: what is known so far?

2013 ◽  
Vol 44 (1) ◽  
pp. 80 ◽  
Author(s):  
Amélie Desvars ◽  
Alain Michault ◽  
Pascale Bourhy
Keyword(s):  
Indian Ocean ◽  
Western Indian Ocean ◽  
Ocean Islands

scholarly journals Invasive Australian acacias on western Indian Ocean islands: a historical and ecological perspective

2008 ◽  
Vol 46 (4) ◽  
pp. 684-689 ◽  
Author(s):  
C. A. Kull ◽  
J. Tassin ◽  
G. Rambeloarisoa ◽  
J.-M. Sarrailh
Keyword(s):  
Indian Ocean ◽  
Western Indian Ocean ◽  
Ecological Perspective ◽  
Ocean Islands
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