17.11.2014 Views

1 - Instituto de Biologia da UFRJ

1 - Instituto de Biologia da UFRJ

1 - Instituto de Biologia da UFRJ

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Figure 2. Average number of Kelp Gull pairs (bars) and average Southern<br />

Oscillation In<strong>de</strong>x (line) at each summer in Admiralty Bay. Error bars are<br />

stan<strong>da</strong>rd errors.<br />

Figure 4. Variation of Temperature as a response to Southern Oscillation<br />

In<strong>de</strong>x (SOI).<br />

greater number of ice-free areas, but there were few bree<strong>de</strong>rs<br />

as a function of high SOI.<br />

The variations of El-Niño have an influence on Antarctic<br />

waters and can affect the animal population and ecological<br />

processes within populations. In the short term such effect<br />

reduces the numbers of breeding pairs and as a consequence<br />

the breeding success of the population. In the long term,<br />

recruitment rates can be affected, and it may imply in lower<br />

growth rates.<br />

Figure 3. Variation of average number of Kelp Gull pairs in response to<br />

the average Southern Oscillation In<strong>de</strong>x. Trend line is a quadratic function<br />

represented by the equation Y = 1.6*X – 1.75*X 2 +6.34; R 2 = 0.62.<br />

(Lescroël et al., 2009; Beaulieu et al., 2010). One explanation<br />

for such changes is the increasing influence of ENSO in<br />

Antarctica (Croxall et al., 2002). The 2009/10 summer was<br />

the col<strong>de</strong>st in the last <strong>de</strong>ca<strong>de</strong>s (INPE, 2010). We verified<br />

in surveys that there were few ice-free areas, reducing<br />

the availability or suitability of breeding habitat, but the<br />

subsequent summer (2010/11) was warmer providing a<br />

Acknowledgements<br />

This work integrates the National Institute of Science and<br />

Technology Antarctic Environmental Research (INCT-<br />

APA) that receives scientific and financial support from the<br />

National Council for Research and Development (CNPq<br />

process: n° 574018/2008-5) and Carlos Chagas Research<br />

Support Foun<strong>da</strong>tion of the State of Rio <strong>de</strong> Janeiro (FAPERJ<br />

n° E-16/170.023/2008). The authors also acknowledge the<br />

support of the Brazilian Ministries of Science, Technology<br />

and Innovation (MCTI), of Environment (MMA) and Inter-<br />

Ministry Commission for Sea Resources (CIRM).<br />

82 | Annual Activity Report 2011

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!