Impacts of climate variability and human colonization on the vegetation of the Galápagos Islands

Impacts of climate variability and human colonization on the vegetation of the Galápagos Islands

A high-resolution (2–9 year sampling interval) fossil pollen record from the Galápagos Islands, which spans the last 2690 years, reveals considerable ecosystem stability. Vegetation changes associated with independently derived histories of El Niño Southern Oscillation variability provided evidence...

Ausführliche Beschreibung

Bibliographische Detailangaben
Veröffentlicht in:Ecology. - John Wiley and Sons, Inc.. - 93(2012), 8, Seite 1853-1866
1. Verfasser: Restrepo, Alejandra (VerfasserIn)
Weitere Verfasser: Colinvaux, Paul, Bush, Mark, Correa-Metrio, Alexander, Conroy, Jessica, Gardener, Mark R., Jaramillo, Patricia, Steinitz-Kannan, Miriam, Overpeck, Jonathan
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2012
Zugriff auf das übergeordnete Werk:Ecology
Schlagworte:Biological sciences Physical sciences Environmental studies
LEADER 01000caa a22002652c 4500
001 JST091967058
003 DE-627
005 20240624004709.0
007 cr uuu---uuuuu
008 151228s2012 xx |||||o 00| ||eng c
035 |a (DE-627)JST091967058 
035 |a (JST)23225187 
040 |a DE-627  |b ger  |c DE-627  |e rakwb 
041 |a eng 
100 1 |a Restrepo, Alejandra  |e verfasserin  |4 aut 
245 1 0 |a Impacts of climate variability and human colonization on the vegetation of the Galápagos Islands 
264 1 |c 2012 
336 |a Text  |b txt  |2 rdacontent 
337 |a Computermedien  |b c  |2 rdamedia 
338 |a Online-Ressource  |b cr  |2 rdacarrier 
520 |a A high-resolution (2–9 year sampling interval) fossil pollen record from the Galápagos Islands, which spans the last 2690 years, reveals considerable ecosystem stability. Vegetation changes associated with independently derived histories of El Niño Southern Oscillation variability provided evidence of shifts in the relative abundance of individual species rather than immigration or extinction. Droughts associated with the Medieval Climate Anomaly induced rapid ecological change that was followed by a reversion to the previous state. The paleoecological data suggested nonneutral responses to climatic forcing in this ecosystem prior to the period of human influence. Human impacts on the islands are evident in the record. A marked decline in long-term codominants of the pollen record, Alternanthera and Acalypha, produced a flora without modern analogue before 1930. Intensified animal husbandry after ca. 1930 may have induced the local extinction of Acalypha and Alternanthera. Reductions in populations of grazing animals in the 1970s and 1980s did not result in the return of the native flora, but in invasions by exotic species. After ca. 1970 the trajectory of habitat change accelerated, continuously moving the ecosystem away from the observed range of variability in the previous 2690 years toward a novel ecosystem. The last 40 years of the record also suggest unprecedented transport of lowland pollen to the uplands, consistent with intensified convection and warmer wet seasons. 
540 |a Copyright © 2012 Ecological Society of America 
650 4 |a Biological sciences  |x Biology  |x Botany  |x Palynology  |x Pollen 
650 4 |a Physical sciences  |x Earth sciences  |x Geography  |x Geomorphology  |x Bodies of water  |x Lakes  |x Crater lakes 
650 4 |a Environmental studies  |x Atmospheric sciences  |x Atmospheric physics  |x Southern oscillation  |x El Nino 
650 4 |a Environmental studies  |x Environmental sciences  |x Climate change 
650 4 |a Biological sciences  |x Biology  |x Botany  |x Plant ecology  |x Vegetation 
650 4 |a Biological sciences  |x Ecology  |x Aquatic ecology  |x Freshwater ecology 
650 4 |a Environmental studies  |x Atmospheric sciences  |x Climatology  |x Paleoclimatology 
650 4 |a Physical sciences  |x Earth sciences  |x Geography  |x Geomorphology  |x Landforms  |x Impact landforms  |x Impact craters 
650 4 |a Biological sciences  |x Ecology  |x Ecosystems 
650 4 |a Biological sciences  |x Ecology  |x Aquatic ecology  |x Marine ecology 
655 4 |a research-article 
700 1 |a Colinvaux, Paul  |e verfasserin  |4 aut 
700 1 |a Bush, Mark  |e verfasserin  |4 aut 
700 1 |a Correa-Metrio, Alexander  |e verfasserin  |4 aut 
700 1 |a Conroy, Jessica  |e verfasserin  |4 aut 
700 1 |a Gardener, Mark R.  |e verfasserin  |4 aut 
700 1 |a Jaramillo, Patricia  |e verfasserin  |4 aut 
700 1 |a Steinitz-Kannan, Miriam  |e verfasserin  |4 aut 
700 1 |a Overpeck, Jonathan  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Ecology  |d John Wiley and Sons, Inc.  |g 93(2012), 8, Seite 1853-1866  |w (DE-627)311927165  |w (DE-600)2010140-5  |x 19399170  |7 nnas 
773 1 8 |g volume:93  |g year:2012  |g number:8  |g pages:1853-1866 
856 4 0 |u https://www.jstor.org/stable/23225187  |3 Volltext 
912 |a GBV_USEFLAG_A 
912 |a SYSFLAG_A 
912 |a GBV_JST 
912 |a GBV_ILN_11 
912 |a GBV_ILN_20 
912 |a GBV_ILN_22 
912 |a GBV_ILN_23 
912 |a GBV_ILN_24 
912 |a GBV_ILN_31 
912 |a GBV_ILN_32 
912 |a GBV_ILN_39 
912 |a GBV_ILN_40 
912 |a GBV_ILN_60 
912 |a GBV_ILN_62 
912 |a GBV_ILN_63 
912 |a GBV_ILN_65 
912 |a GBV_ILN_69 
912 |a GBV_ILN_70 
912 |a GBV_ILN_72 
912 |a GBV_ILN_73 
912 |a GBV_ILN_74 
912 |a GBV_ILN_90 
912 |a GBV_ILN_95 
912 |a GBV_ILN_100 
912 |a GBV_ILN_101 
912 |a GBV_ILN_105 
912 |a GBV_ILN_110 
912 |a GBV_ILN_120 
912 |a GBV_ILN_138 
912 |a GBV_ILN_150 
912 |a GBV_ILN_151 
912 |a GBV_ILN_161 
912 |a GBV_ILN_170 
912 |a GBV_ILN_171 
912 |a GBV_ILN_187 
912 |a GBV_ILN_213 
912 |a GBV_ILN_224 
912 |a GBV_ILN_230 
912 |a GBV_ILN_266 
912 |a GBV_ILN_285 
912 |a GBV_ILN_293 
912 |a GBV_ILN_370 
912 |a GBV_ILN_374 
912 |a GBV_ILN_381 
912 |a GBV_ILN_602 
912 |a GBV_ILN_636 
912 |a GBV_ILN_702 
912 |a GBV_ILN_2001 
912 |a GBV_ILN_2003 
912 |a GBV_ILN_2004 
912 |a GBV_ILN_2005 
912 |a GBV_ILN_2006 
912 |a GBV_ILN_2007 
912 |a GBV_ILN_2008 
912 |a GBV_ILN_2009 
912 |a GBV_ILN_2010 
912 |a GBV_ILN_2011 
912 |a GBV_ILN_2014 
912 |a GBV_ILN_2015 
912 |a GBV_ILN_2018 
912 |a GBV_ILN_2020 
912 |a GBV_ILN_2021 
912 |a GBV_ILN_2025 
912 |a GBV_ILN_2026 
912 |a GBV_ILN_2027 
912 |a GBV_ILN_2034 
912 |a GBV_ILN_2037 
912 |a GBV_ILN_2038 
912 |a GBV_ILN_2044 
912 |a GBV_ILN_2048 
912 |a GBV_ILN_2049 
912 |a GBV_ILN_2050 
912 |a GBV_ILN_2055 
912 |a GBV_ILN_2056 
912 |a GBV_ILN_2057 
912 |a GBV_ILN_2059 
912 |a GBV_ILN_2061 
912 |a GBV_ILN_2064 
912 |a GBV_ILN_2068 
912 |a GBV_ILN_2088 
912 |a GBV_ILN_2093 
912 |a GBV_ILN_2106 
912 |a GBV_ILN_2107 
912 |a GBV_ILN_2108 
912 |a GBV_ILN_2110 
912 |a GBV_ILN_2111 
912 |a GBV_ILN_2113 
912 |a GBV_ILN_2118 
912 |a GBV_ILN_2119 
912 |a GBV_ILN_2122 
912 |a GBV_ILN_2129 
912 |a GBV_ILN_2143 
912 |a GBV_ILN_2144 
912 |a GBV_ILN_2147 
912 |a GBV_ILN_2148 
912 |a GBV_ILN_2152 
912 |a GBV_ILN_2153 
912 |a GBV_ILN_2188 
912 |a GBV_ILN_2190 
912 |a GBV_ILN_2232 
912 |a GBV_ILN_2336 
912 |a GBV_ILN_2360 
912 |a GBV_ILN_2470 
912 |a GBV_ILN_2472 
912 |a GBV_ILN_2507 
912 |a GBV_ILN_2548 
912 |a GBV_ILN_2579 
912 |a GBV_ILN_2932 
912 |a GBV_ILN_2939 
912 |a GBV_ILN_2942 
912 |a GBV_ILN_2946 
912 |a GBV_ILN_2949 
912 |a GBV_ILN_2950 
912 |a GBV_ILN_2951 
912 |a GBV_ILN_4012 
912 |a GBV_ILN_4027 
912 |a GBV_ILN_4028 
912 |a GBV_ILN_4029 
912 |a GBV_ILN_4035 
912 |a GBV_ILN_4037 
912 |a GBV_ILN_4046 
912 |a GBV_ILN_4112 
912 |a GBV_ILN_4116 
912 |a GBV_ILN_4125 
912 |a GBV_ILN_4126 
912 |a GBV_ILN_4155 
912 |a GBV_ILN_4219 
912 |a GBV_ILN_4242 
912 |a GBV_ILN_4246 
912 |a GBV_ILN_4249 
912 |a GBV_ILN_4251 
912 |a GBV_ILN_4266 
912 |a GBV_ILN_4305 
912 |a GBV_ILN_4306 
912 |a GBV_ILN_4307 
912 |a GBV_ILN_4309 
912 |a GBV_ILN_4310 
912 |a GBV_ILN_4311 
912 |a GBV_ILN_4313 
912 |a GBV_ILN_4314 
912 |a GBV_ILN_4315 
912 |a GBV_ILN_4316 
912 |a GBV_ILN_4317 
912 |a GBV_ILN_4318 
912 |a GBV_ILN_4319 
912 |a GBV_ILN_4322 
912 |a GBV_ILN_4323 
912 |a GBV_ILN_4324 
912 |a GBV_ILN_4325 
912 |a GBV_ILN_4326 
912 |a GBV_ILN_4328 
912 |a GBV_ILN_4333 
912 |a GBV_ILN_4334 
912 |a GBV_ILN_4335 
912 |a GBV_ILN_4336 
912 |a GBV_ILN_4338 
912 |a GBV_ILN_4346 
912 |a GBV_ILN_4367 
912 |a GBV_ILN_4393 
912 |a GBV_ILN_4598 
912 |a GBV_ILN_4700 
951 |a AR 
952 |d 93  |j 2012  |e 8  |h 1853-1866