francisco j. barba regidor 2010 - cniesrc's blog · 11/6/2010 · francisco j. barba regidor...
TRANSCRIPT
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LifeLife StoryStory
Francisco J. Barba RegidorFrancisco J. Barba Regidor
20102010
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Many different organisms ocupy our planet. Those differences are
ranging both in shape, size and biological characteristics. Some of them
are adapted to aquatic conditions, but some others are arranged to
terrestrial environments. There are which prefer cold weather, but there
are many others prefering hot climates.
But, all of these living beings we are seeing today did not exist from the
begining of the times.
In the past, many different organisms with respect to the actuals were
living in the Earth and we can know them throughout the fossils.
In the picture, e.g., a sample withthe fossiliferous remainders(fossils) of Trilobites from thePaleozoic of Eastern Canada.
http://mdbourrie.googlepages.com/7ae1.jpg/7ae1-full.jpg
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WhatWhat’’ss a a fossilfossil
• A fossil is an organic trace buried by natural processes
and subsequently permanently preserved. The term
“organic trace” is referred to skeletal material, impressions of organisms, excremental material, tracks, trails or borings. Human artifts are not
regarded as fossils.• Un fósil es un resto orgánico que ha sido enterrado por procesos naturales y
posteriormente preservado permanentemente. El término “resto orgánico” se
refiere a material esquelético, impresiones de organismos, pistas, huellas o
perforaciones. Las obras humanas no son consideradas como fósiles.
From: Whitten & Brooks (1977). The Penguin Dictionary ofGeology. Penguin Books Ltd.
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INSECTS ON AMBER:
http://bp3.blogger.com/_vUKAvFJkvXY/Rc_11GJyvvI/A
AAAAAAAAA4/-PoSpSK2w4c/s1600-h/amb-37.jpg
ORGANIC REMAINDERS OF FOSSIL FISH:
http://bp3.blogger.com/_vUKAvFJkvXY/Rc_19G
JyvwI/AAAAAAAAABA/dUMP76-peYs/s1600-
h/GreenRiver+Fish.jpg
TRACKS OF DINOSAURS:
http://es.encarta.msn.com/media_201619532_961545275_-
1_1/Huellas_f%C3%B3siles_de_dinosaurios_en_Tierra_de
_Cameros.html
DifferentDifferent typestypes
ofof FossilsFossils
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FossilizationFossilizationFossilization is the natural
process producing fossils, and it
consists on the alteration of the
remains of an organism, impres-
sions or activities by physical,
biological or chemical changes,
retaining the original material in
some form.
La fosilización es el proceso natural que
produce fósiles y consiste en la alteración de los
restos, de las impresiones o de las actividades de
un organismo por cambios físicos, biológicos o
químicos, conservándose de alguna manera el
material original.
http://www.dkimages.com/discover/Hom
e/Science/Earth-
Sciences/Palaeontology/Fossils/Formatio
n/Ammonites/Sequence-2/Sequence-2-
1.html
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http://www.dinosaur-farm.co.uk/pages/fossils/formation.html
Put in orden the dinosaur’s fossilization sequence.
1 2
3 4 5
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TheThe meaningmeaning ofof fossilsfossilsFossils represent:
• Evidences of living beings existing in thepast times.
• They show thecharacteristicis ofthese living beings(shape, size, food, environment, etc.).
• Which were theirhabitats.
• Which were theirbehaviour.
Reconstruction
of
Anomalocaris:
http://palaeo.gly.bris.
ac.uk/palaeofiles/lage
rstatten/Burgess/Ano
malocarishunts.jpg
Claws of
Anomalocaris:
http://www.mala.bc.ca
/~earles/burgess/part-
1020.jpg
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GeologicGeologic time time spiralspiral
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GeologicGeologic times times andand itsits magnitudemagnitude
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http://en.wikipedia.org/wiki/Image:Extinction_intensity.svg
La historia de la vida en la Tierra, una sucesión de episodios catastróficos (picos) y momentos de expansión
de nuevas formas de vida (valles).
v
p
p
pp
p
p
pp
pv
vv
v
vv
v
v
v
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http://www.bioinquiry.vt.edu/bioinquiry/Cheetah/cheetahpaid/cheetahhtmls/georecord.html
A lo largo del tiempo geológico se constata que se ha producido una tendencia hacia la diversificación permanente de los seres vivos, si bien, al menos pueden observarse cuatro grandes episodios de grandes desapariciones de formas de vida (extinciones masivas): ver las flechas.
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http://www.lbl.gov/Science-Articles/Archive/extinctions-nemesis.html
En realidad, de
acuerdo con este
esquema de las
extinciones de
vida, recopiladas
por D. Raup y J.
Sepkoski de la
Universidad de
Chicago, se
muestra en los
picos de las
extinciones que
se han ido
produciendo a
intervalos de 26
a 30 m.a., tal
como lo indican
las flechas.
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http://universe-review.ca/I10-38-evolution.jpg
Radiación evolutiva a lo largo del tiempo geológico
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EVOLUCIÓN DE LOS SERES VIVOSLA VIDA EN EL PRECÁMBRICO MÁS ANTIGUO
Flagelado
Algas verdes
Diatomeas
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http://universe-review.ca/I10-
77-Ediacara.jpg
Smithsonian Natural history Museum Edicara
Diorama:
http://www.dinosaurcollector.150m.com/edicara.htm
La vida en el Precámbrico en Australia: un paisaje con Dickinsonia sp. (a la derecha, fósil)
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Ogygopsis:
http://www.mala.bc.ca/~earles/burgess/ogygopsis5.jpg
Olenoides and Ogygopsis:
http://www.mala.bc.ca/~earles/burgess/olenoides-
ogygopsis5.jpg
Fauna fossil from Burgess Shale (1)
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Fauna fossil from Burgess Shale (2)
Claws of Anomalocaris:
http://www.mala.bc.ca/~earles/burgess/part-1020.jpg
Reconstruction of Anomalocaris:
http://palaeo.gly.bris.ac.uk/palaeofiles/lagerstatten/Burgess/
Anomalocarishunts.jpg
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Anomalocaris briggsi, endemic to
the Emu Bay Shale. http://members.tripod.com/~Cambrian/Anomalocaris
Vauxia (one of the numerous corals
living on the floor of the Burgess
Shale seas):
http://www.mala.bc.ca/~earles/burgess/vauxia.jpg
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Burgess shale
landscape
recontruction
in the late
Neoproterozoic
period (ca.
800-542 Ma). From: http://www-eaps.mit.edu/geobiology/research/neoprot.html
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El El NeoproterozoicoNeoproterozoico: : ¿¿ddóónde estaba la nde estaba la PenPeníínsula Ibnsula Ibéérica?rica?
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Biota of the Burgess Shale: Sponges Vanuxia (1), Choia (2), Pirania (3); brachiopods Nisusia (4);
polychaetes Burgessochaeta (5); priapulid worms Ottia (6), Louisella (7); trilobites Olenoides (8); other
arthropods Sidneyia (9), Leanchoilia (10), Marella (11), Canadaspis (12), Molaria (13), Burgessia (14),
Yohoia (15), Waptia (16), Aysheaia (17); molluscs Scenella (18); echinoderms Echmatocrinus (19);
chordates Pikaia (20); along with Haplophrentis (21), Opabina (22), lophophorate Dinomischus (23),
proto-annelid Wiwaxia (24), and anomalocarid Laggania cambria (25). From The Fossils of the Burgess
Shales, by Briggs, Erwin and Collier, 1994).
From http://www.palaeos.com/Paleozoic/Cambrian/Amgan.htm
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El Paleozoico: una nueva Era en todo...El Paleozoico: una nueva Era en todo...
• Hay una gran diversificación en los invertebrados.
• Los vertebrados comienzan su eclosión con la aparición de los peces a mitad de la Era.
• Las anfibios, cuando ya está bien avanzada, aparecen en la Tierra a partir de peces con pulmones.
• Las plantas terrestres comienzan su aparición al tiempo que los peces se están desarrollando.
• A finales del Paleozoico empiezan a desarrollarse los reptiles (primeros dinosaurios).
• … Parece que la vida no tiene vuelta atrás.
• Y sin embargo, a finales del Paleozoico tiene lugar la mayor crisis biológica de la historia del planeta, con una desaparición del 96% de las especies marinas y el 70% de las especies de vertebradosterrestres.
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Trilobites (1) live among many species that are not normally preserved. A typical Cambrian outcrop might produce
only trilobites, brachiopods (2), mollusks (3), and crinoids (4). That is a tiny fraction of the full Cambrian biota,
better represented by the roster of the Burgess Shale Cambrian Konservat-Lagerstatten. That community includes
sponges Vauxia (5), Hazelia (6), and Eifellia (7); brachipods Nisusia (2); priapulid worms Ottoia (8); trilobites
Olenoides (1); other arthropods such as Sidneyia (9), Leanchoilia (10), Marella (11), Canadaspis (12), Helmetia
(13), Burgessia (14), Tegopelte (15), Naraoia (16), Waptia (17), Sanctacaris (18), and Odaraia (19); lobopods
Hallucigenia (20) and Aysheaia (21); mollusks Scenella (3); echinoderms Echmatocrinus (4); and chordates Pikaia
(22); among other oddities, including Haplophrentis (23), Opabinia (24), Dinomischus (25), Wiwaxia (26),
Amiskwia (27), and Anomalocaris (28). ©2002 by S.M. Gon III (composition & linework) & John Whorrall.
http://users.path.ox.ac.uk/~wjames/Evolution/evolution4_files/frame.htm#slide0006.htm
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http://universe-review.ca/I10-28-Ordovician.jpg
Paisaje marino en el Ordovícico (Paleozoico inferior)
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http://www.metahistory.org/Overview.php
Extinción tardiordovícica
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http://universe-review.ca/I10-29-Silurian.jpg
Paisaje marino en el Silúrico (Paleozoico medio)
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http://universe-review.ca/I10-30-fish.jpg
Paisaje marino en el Devónico (Paleozoico medio)
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http://www.ecuadorciencia.org/blog.asp?id=5327
Paisajes terrestres del Carbonífero: grandes bosques de helechos, grandes insectos y vertebrados terrestres.
http://dustdevil.deviantart.com/art/Carboniferous-lands...
http://geologimania.blogspot.com/ http://home.c2i.net/earth/paleogeo/sen_karbon_detalj1.html
Sigillaria
Calamites
Lepidodendron
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El paisaje pEl paisaje péérmico: los vertebrados rmico: los vertebrados terrestres al poder.terrestres al poder.
http://www.ebrisa.com/portalc/
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http://universe-review.ca/I10-32-Permian.jpg
Paisaje terrestre del Pérmico: en continuidad con el pasado.
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FÓSILES-GUÍA del PALEOZOICO
TRILOBITES
GRAPTOLITES
EVOLUCIÓN DE LOS SERES VIVOS
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FÓSILES DEL PALEOZOICO
PLANTAS ( con esporas)
Musgos y Helechos
NO CORDADOS
Corales,
Moluscos
Artrópodos
CORDADOS
Peces acorazados
SIGILLARIA (tronco)
CALCEOLA
Braquiópodos
SPIRIFER
TEREBRATULA
TRILOBITES
Anfibio
EVOLUCIÓN DE LOS SERES VIVOS
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Los grandes cambios del Paleozoico
http://www.biologyjunction.com/vertebrate_notes.htm
http://www.vi.cl/foro/topic/6988-capitulos-de-
biologia-cuestiones-resueltas/page__st__220
La eclosión de los invertebrados y la
aparición de los primeras plantas
vasculares terrestres en el Devónico y de
los primeros vertebrados (peces) a
mediados de la Era y la evolución de éstos
hacia los anfibios y los reptiles son algunos
de los aspectos evolutivos más
significativos.
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La GeografLa Geografíía a comienzos del Carbona a comienzos del Carbonííferofero
http://www.scotese.com/newpage4.htm
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La GeografLa Geografíía a finales del Carbona a finales del Carbonííferofero
http://www.scotese.com/late.htm
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El PEl Péérmico: un solo continentermico: un solo continente……
http://www.scotese.com/newpage5.htm
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Al finalizar el PAl finalizar el Péérmico: rmico: Pangea (Pangea (““Toda la TierraToda la Tierra””))
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El Mesozoico o Era SecundariaEl Mesozoico o Era SecundariaAlgo más que meros cambios en la geografía de los continentes y de los océanos se producen en el planeta. Además de la ruptura de Pangea, los seres vivos también contribuyen a cambiar la cara de la Tierra: a los helechos les empiezan a suceder las plantas gimnospermas y de entre los vertebrados, los reptiles (dinosaurios) se expanden por todos los ecosistemas dominando la tierra, los mares y el aire.
Península Ibérica
http://www.scotese.com/newpage8.htm
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Paisaje TriPaisaje TriáásicosicoA los helechos arborescentes ya les sustituyen plantas gimnospermas,
como grandes cicadales, entre otras. Los primeros reptiles –poco
parecidos a los actuales de momento- ya corren por la superficie de las
tierras emergidas-
http://www.scielo.org.ar/scielo
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http://science.nationalgeographic.com/staticfiles/NGS/Shared/StaticFiles/Science/Images/Content/triassic-
dinosaurs-22937967-jupiter-xl.jpg
Triassicfauna andflora
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http://universe-review.ca/I10-33-Triassic2.jpg
La primera selección de dinosaurios
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El paisaje JurEl paisaje Juráásico:sico:mar y tierramar y tierra
http://arquitecturadefpaisaje.blogspot.com/2009/04/el-
jurasico-es-el-sistema-o-periodo.html
http://rutasporasturiasconpeques.blogspot.co
m/2009/03/costa-de-los-dinosaurios.html
Gigantes animales dominaron la Tierra
en este periodo de la Era Mesozoica y lo
seguirían haciendo a lo largo del
siguiente, el Cretácico, en total, unos 180
m.a. si contamos desde comienzos del
Triásico.
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PaleogeografPaleogeografíía del Jura del Juráásico (1)sico (1)
http://www.scotese.com/jurassic.htm
Península Ibérica
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PaleogeografPaleogeografíía del Jura del Juráásico (2)sico (2)
http://www.scotese.com/late1.htm
Península Ibérica
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http://universe-review.ca/R10-08-Cretaceous.htm
http://universe-review.ca/R10-19-animals.htm#Vendian
Jurassic (left)
and Cretaceous (right) life
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PaleogeografPaleogeografíía del Creta del Cretáácicocico
Península Ibérica
Así estaban los continentes cuando se extinguieron los dinosaurios… bueno, casi todos los
dinosaurios
http://www.scotese.com/cretaceo.htm
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FÓSILES DEL MESOZOICO
PLANTAS ( con flores)
Gimnospermas (Coníferas)
(semilla sin protección)
NO CORDADOS
Equinodermos,
Moluscos
CORDADOS
Crinoideos
Ammonites
Belemnites
EVOLUCIÓN DE LOS SERES VIVOS
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REPTILES FÓSILES DEL MESOZOICO
COTILOSAURIOS.
Más antiguos. Tipo cocodrilos
ICTIOSAURIOS. Con aletas. Carnívoros
PTEROSAURIOS. Con alas. Carnívoros. Precursores de las aves
DINOSAURIOS. Terrestres. Con grandes patas. Gran éxito evolutivo
Saurópodos. Diplodocus
Terápodos. Tyranosaurus
Estegosaurios. Estegosaurus
Ornitópodos. Triceratops
EVOLUCIÓN DE LOS SERES VIVOS
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DINOSAURIO HERBÍVORO
PTEROSAURIO VOLADOR
DINOSAURIO CARNÍVORO
ESTEGOSAURIO
TRICERATOPS
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http://geo.arc.nasa.gov/sge/jskiles/fliers/all_flier_prose/asteroid_toon/asteroid_toon.html
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http://www.uprh.edu/exegesis/33/bruckman.html
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The beginning of the TertiaryThe beginning of the Tertiary
El gran cataclismo de finales del Cretácico tiene lugar en Yucatán (actual golfo de México),
entonces un brazo de mar que separaba Norteamérica de Sudamérica. Faltaba mucho aún para
que ambos continentes se unieran por el istmo de Panamá. Pero ya las posiciones de todos los
continentes iban pareciéndose mucho a las actuales. Y ya los mamíferos dejaban de ser unas
formas de vida escasamente representativas de la biosfera: comenzaba su eclosión y dispersión.
http
://w
ww
.sco
tese
.com
/new
page
9.ht
m
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Towards the end of the Tertiary (14 My Towards the end of the Tertiary (14 My ago), the world seems recognizableago), the world seems recognizable
http
://w
ww
.sco
tese
.com
/mio
cene
.htm
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http://universe-review.ca/R10-09-Tertiary.htm
La fauna del Terciario: ¿dónde están los dinosaurios…?
Tertiary fauna: Where are the dinosaurs?
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FÓSILES DEL
TERCIARIO Y CUATERNARIO
PLANTAS ( con flores)
Angiospermas
(semilla con protección)
NO CORDADOS
Nummulites
Equinodermos
Artrópodos
CORDADOS
Aves
Mamíferos
Restos humanos
ArqueopterixMamut
Australopithecus
Nummulites
Equinodermos
EVOLUCIÓN DE LOS SERES VIVOS
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TheThe EarthEarth has has beenbeen in in anan Ice Ice HouseHouse ClimateClimatemodemode forfor thethe lastlast 30 30 millionmillion yearsyears
… and the last expansion of the polar ice sheets took place about18,000 years ago.
http
://w
ww
.sco
tese
.com
/last
ice.
htm
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http://www.awi.de/typo3temp/pics/374fcd2373.jpg
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Major phylogenetic groups affected at each extinction pulse:1. Ordovician (440 mya). Extinction of deep-shelf benthic faunas including trilobites,
graptolites, and conodonts.
2. Devonian (365 mya). Decimation of coral reefs, brachiopods, and calcareous
foraminifera.
3. Permian (250 mya). Estimated 96% extinctions at species level in the marine
realm, and for the first time, drastic reduction in the number of terrestrial tetrapod
families.
4. Triassic (210 mya). Extinctions wiped out 23% of both marine and non-marine
animal families, including sponges, gastropods, bivalves, cephalopods, brachiopods,
insects, and vertebrates.
5. Cretaceous (65 mya). The extinction of all non-avian dinosaurs, plus substantial to
complete losses among such diverse groups as ammonites, nannoplankton, rudists,
and certain marine reptiles.
The end-Pleistocene extinction event does not qualify as a mass extinction. It is
better classified as a taxon-specific event, affecting primarily the Class Mammalia
(although birds and, to a lesser extent, reptiles were also affected). Nor was it global,
although later in the Quaternary many other regions were affected by dramatic losses
of a similar sort.http://www.amnh.org/science/biodiversity/extinction/Intro/OngoingProcess.htm
l
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K–T boundary along Interstate 25 near Raton Pass, Colorado. Theiridium-rich ash (the boundary) is indicated by the red arrow. http://en.wikipedia.org/wiki/Cretaceous%E2%80%93Tertiary_extinction_event
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Badlands near Drumheller, Alberta where erosion has exposed the K–T boundary. http://en.wikipedia.org/wiki/Cretaceous%E2%80%93Tertiary_extinction_event
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http://www.freerepublic.com/focus/f-news/1541892/posts
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EVOLUCIÓN HUMANA
Australopithecus 2 millones años
Homo ergaster 1 millón años
800.000 mil años
1,5 millones añosHomo habilis
Homo antecessor
Homo erectus
500.000 mil años
Homo neanderthalensis
Homo sapiens
50.000 mil años
30.000 mil años
(Manos libres)
(Herramientas)
(Constitución física)
(fuego)
500 cc
1600 cc
Capacidad
craneal
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Mejora de la calidad de vida:
> Alimentación más variada, nutritiva e higiénica
> Mayor resistencia a las enfermedades
> Mejores condiciones de defensa (clima, depredadores,…)
> Más tiempo de ocio
EVOLUCIÓN HUMANA
MÁS FUNCIONES MAYOR CAPACIDAD ENCEFÁLICA
POBLACIONES MÁS NUMEROSAS: Mayor de natalidad y menor mortalidad
MAYOR POSIBILIDAD DE CAMBIOS GENÉTICOS Y EVOLUCIÓN
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EVOLUCIEVOLUCIEVOLUCIEVOLUCIÓÓÓÓN DE LOS SERES VIVOSN DE LOS SERES VIVOSN DE LOS SERES VIVOSN DE LOS SERES VIVOS
EVOLUCIÓN HUMANA
Desde hace 5 millones de años
Posición y altura
Pelo
Mandíbu
la
Frente y cerebro
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Australopithecus afarensis
(“Lucy”)
Edad: 3 millones de años
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Homo habilis
Edad: 2 millone
s de año
s
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Homo ergaster
Edad: 1,5 millon
es de añ
os
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Homo erectus
Edad: 1 millón de años
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Edad: 800.000 años
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Homo neanderthalensis
Edad: 30.00
0 años
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Australopithecus
Homo habilis
Homo ergaster
Homo erectus
Homo neanderthalensis
Homo sapiens
Human evolution through the skulls.