Ibis
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Landscape‐scale socio‐economics of sea‐level rise
Ibis - Tập 146 Số s1 - Trang 11-17 - 2004
Flooding due to sea‐level rise resulting from climate may have serious
socio‐economic consequences. Socio‐economic impacts of an accelerated sea‐level
rise are often described at an aggregated spatial level that is useful for
inter‐regional or international comparisons, but this is of limited value for
determining local effects. Local effects need to be based on the local
attributes of coastal vul...
Assessing the impacts of wind farms on birds
Ibis - Tập 148 Số s1 - Trang 29-42 - 2006
The potential effects of the proposed increase in wind energy developments on
birds are explored using information from studies of existing wind farms.
Evidence of the four main effects, collision, displacement due to disturbance,
barrier effects and habitat loss, is presented and discussed. The consequences
of such effects may be direct mortality or more subtle changes to condition and
breeding s...
Non‐inversion tillage and farmland birds: a review with special reference to the UK and Europe
Ibis - Tập 146 Số s2 - Trang 192-202 - 2004
This paper reviews the current knowledge of the effects of non‐inversion tillage
(NIT) on farmland birds and their food resources. NIT is a method of
establishing a crop without using a mouldboard plough and is becoming
increasingly popular in the UK. NIT generally disturbs the soil to shallower
depths than conventional tillage and is therefore expected to have beneficial
effects on biodiversity o...
Designing mosaic landscapes for B lack G rouse T etrao tetrix using multi‐scaled models
Ibis - Tập 155 Số 4 - Trang 792-803 - 2013
With increasing pressures on land for human use, it is important to identify the
habitat requirements of key species, not just in terms of a correlation with a
given habitat feature, but also the relationship between species presence and
its coverage, proximity to other habitat types, and importance at different
spatial scales. We used maximum entropy to estimate the optimal proportions of
18 habi...
DO TROPICAL BIRDS REAR AS MANY YOUNG AS THEY CAN NOURISH ?
Ibis - Tập 91 Số 3 - Trang 430-455 - 1949
Summary. The thesis that birds lay clutches of eggs which will produce as many
nestlings as they can, on the average, adequately nourish, is considered in
relation to the Central American avifauna. Birds whose usual rate of bringing
food to the nest is slow can greatly augment this rate if, after an
exceptionally long period of neglect, they find their nestlings unusually hungry
(examples are give...
Do Levant Sparrowhawks Accipiter brevipes also migrate at night?
Ibis - Tập 135 Số 3 - Trang 233-236 - 1993
Flight paths of visually identified Levant Sparrowhawks Accipiter brevipes on
autumn migration were analysed with a tracking radar in the Arava Valley,
Israel. This time of the year there are no significant numbers of other species
with a similar wing‐beat pattern. This wing‐beat pattern was found not only in
daytime but also frequently at night. It is suggested that the Levant
Sparrowhawk uses tw...
Remote techniques for counting and estimating the number of bird–wind turbine collisions at sea: a review
Ibis - Tập 148 Số s1 - Trang 76-89 - 2006
Since the early 1990s, marine wind farms have become a reality, with at least
13 000 offshore wind turbines currently proposed in European waters. There are
public concerns that these man‐made structures will have a significant negative
impact on the many bird populations migrating and wintering at sea. We assess
the degree of usefulness and the limitations of different remote technologies
for stu...
Significance of the White Sea as a stopover for Bewick's Swans Cygnus columbianus bewickii in spring
Ibis - Tập 143 Số 1 - Trang 63-71 - 2001
We searched for a major stopover site of Bewick's Swans Cygnus columbianus
bewickii in the White Sea following the suggestion that one should exist on the
stretch between Estonia and the breeding grounds (1750 km). We discovered 733
Swans in Dvina Bay during a late aerial survey in spring 1993. Subsequently,
ground‐based research was carried out in May 1994, 1995 and 1996 in the Dry Sea,
a tidal, ...
Body size, fitness and compatibility in Barnacle GeeseBranta leucopsis
Ibis - Tập 138 Số 4 - Trang 700-709 - 1996
Large‐sized Barnacle GeeseBranta leucopsisof both sexes had a higher probability
of breeding successfully in any particular year and produced more goslings than
did smaller birds. Large females paired at an earlier age, suggesting that they
were preferred as mates and were likely to have entered the breeding population
earlier. The relative sizes of the pair bond members also affected fitness. Mos...
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