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Figure 18.1Figure 18.1Human impacts on Human impacts on Marine EcosystemsMarine Ecosystems
What is going on and what are we What is going on and what are we to do about it?to do about it?
WE LIVE IN INTERESTING TIMES
HUMANS AND THE HUMANS AND THE ENVIRONMENTENVIRONMENT
HUMAN BEHAVIORHUMAN BEHAVIOR– IN LIGHT OF ANIMAL BEHAVIORIN LIGHT OF ANIMAL BEHAVIOR– AS AN EVOLVED CHARACTERISTICAS AN EVOLVED CHARACTERISTIC
HUMAN EVOLUTIONHUMAN EVOLUTION– ORIGINS – ESPECIALLY BEHAVIORALORIGINS – ESPECIALLY BEHAVIORAL– AGE – WE ARE A RELATIVELY NEW SPECIESAGE – WE ARE A RELATIVELY NEW SPECIES– LANDMARKS-great achievements-science, medicine…LANDMARKS-great achievements-science, medicine…– RESULTS-life expectancy, infant mortality---but RESULTS-life expectancy, infant mortality---but
BEHAVIORBEHAVIOR WHAT IS IT?WHAT IS IT?
–RESPONSES TO:RESPONSES TO:EXTERNAL STIMULIEXTERNAL STIMULI INTERNAL STIMULIINTERNAL STIMULI
WHAT ARE THE BASIC TYPES WHAT ARE THE BASIC TYPES OF BEHAVIOROF BEHAVIOR
INNATE (INSTINCTIVE)INNATE (INSTINCTIVE)LEARNEDLEARNED
SEAGULL & BIG EGGSSEAGULL & BIG EGGS
GULL WILL SELECT LARGEST EGG GULL WILL SELECT LARGEST EGG WHEN RETURNING TO NESTWHEN RETURNING TO NEST
WHY?WHY? WHAT HAPPENS IF VERY LARGE WHAT HAPPENS IF VERY LARGE
EGGS ARE PRESENTED?EGGS ARE PRESENTED?
WHY?
WHAT INSTINCTIVE WHAT INSTINCTIVE BEHAVIORS DO WE HAVE?BEHAVIORS DO WE HAVE?
FIGHT OR FLIGHT - ADRENALINEFIGHT OR FLIGHT - ADRENALINE SEXUALSEXUAL CULTURALLY-INSTILLED BEHAVIORS?CULTURALLY-INSTILLED BEHAVIORS?
CAN WE OVER-RIDE INSTINCTIVE CAN WE OVER-RIDE INSTINCTIVE BEHAVIORS?BEHAVIORS?
CAN WE OVER-RIDE CULTURALLY-CAN WE OVER-RIDE CULTURALLY-INSTILLED BEHAVIORS?INSTILLED BEHAVIORS?
Hunter-Gather Life StyleHunter-Gather Life Style
For the vast majority of human existence (several million years)
the dominant life style was hunter-gather.
Relatively small egalitarian bands (several dozen individuals)
RECENT HISTORYRECENT HISTORY
AGRICULTURE & INDUSTRIALIZATIONAGRICULTURE & INDUSTRIALIZATION– ABLE TO PRODUCE MORE FOOD ABLE TO PRODUCE MORE FOOD
(overproduction)…(overproduction)…development of classesdevelopment of classes
– ABILITY TO SETTLE LARGE AREASABILITY TO SETTLE LARGE AREAS– WE COLLECT WE COLLECT SYMBOLSSYMBOLS TO REPRESENT TO REPRESENT
THINGSTHINGS MONEY INSTEAD OF FOODMONEY INSTEAD OF FOOD GOLD CHAINSGOLD CHAINS Cars, clothes…materialism…consumerismCars, clothes…materialism…consumerism
ENVIRONMENTAL VIEWSENVIRONMENTAL VIEWS
NO SELECTION FOR SUSTAINABLE YIELD, NO SELECTION FOR SUSTAINABLE YIELD, JUST MOVE ONJUST MOVE ON
RESOURCES ARE STILL SEEN AS RESOURCES ARE STILL SEEN AS UNENDINGUNENDING– LOGGERS IN RAINFORESTS & PACIFIC LOGGERS IN RAINFORESTS & PACIFIC
NORTHWESTNORTHWEST– OCEAN FISHERMENOCEAN FISHERMEN– USE OF FOSSIL FUELSUSE OF FOSSIL FUELS– WASTE DISPOSALWASTE DISPOSAL
NEW EXTRACTIVE TECHNOLOGIES ARE NEW EXTRACTIVE TECHNOLOGIES ARE AWESOME—sucking the resources out AWESOME—sucking the resources out
TAKE HOME MESSAGETAKE HOME MESSAGE HUMAN BEHAVIOR UNDERWENT HUMAN BEHAVIOR UNDERWENT
SEVERAL MILLION YEARS OF INTENSE SEVERAL MILLION YEARS OF INTENSE NATURAL SELECTION (HENCE NATURAL SELECTION (HENCE EVOLUTION) WHILE WE WERE HUNTER-EVOLUTION) WHILE WE WERE HUNTER-GATHERERS. Collective food gathering, GATHERERS. Collective food gathering, child-raising, hunting…communalismchild-raising, hunting…communalism
MUCH OF OUR BEHAVIOR REFLECTS THE MUCH OF OUR BEHAVIOR REFLECTS THE VALUES AND BEHAVIORS APPROPRIATE VALUES AND BEHAVIORS APPROPRIATE TO CURRENT FORM OF TO CURRENT FORM OF SOCIETY=CAPITALISM.SOCIETY=CAPITALISM.
Toxic ChemicalsToxic Chemicals Industrial by-products dumped in Industrial by-products dumped in
storm drainsstorm drains that lead to the ocean that lead to the ocean
Ozone Depletion, CFCs and legislation
Adverse effects Adverse effects on on phytoplanktphytoplanktoon n (base of aquatic (base of aquatic food chain)food chain)
EEffectsffects of Ozone Depletion of Ozone Depletion
Cumulative Effects of All 3 IssuesCumulative Effects of All 3 Issues Disrupt photosynthesis of Disrupt photosynthesis of
phytoplanktonphytoplankton ““BurnBurn”” damage damage ( (lesions, soreslesions, sores)) to fish to fish
–All caused by dissolved organic All caused by dissolved organic compounds compounds
GLOBAL GLOBAL WARMINGWARMING
THE GREENHOUSE EFFECT
GLOBAL CHANGE
Sea Level ChangesSea Level Changes Seas are projected to rise up to Seas are projected to rise up to
ONE meter in the next 100 yearsONE meter in the next 100 years Many of the world’s major cities are areas Many of the world’s major cities are areas
would be flooded (many new Venice, Italy)would be flooded (many new Venice, Italy)
Effects on OrganismsEffects on Organisms Decline in local populations Decline in local populations
((California California ZooplanktonZooplankton ))
Shifts in geological Shifts in geological
& geographical & geographical rangesranges
SEWAGESEWAGE PRODUCTS OF HUMAN DIGESTIVE SYSTEM PRODUCTS OF HUMAN DIGESTIVE SYSTEM
– NUTRIENTSNUTRIENTS– BACTERIA AND VIRUSESBACTERIA AND VIRUSES
HEALTH HAZARDHEALTH HAZARD– HUMAN PATHOGENS (HUMAN PATHOGENS (E. coliE. coli))
ECOLOGICAL PROBLEMS (LOCAL)ECOLOGICAL PROBLEMS (LOCAL)– TOO MANY NUTRIENTS IN ONE AREATOO MANY NUTRIENTS IN ONE AREA– PLANKTON BLOOMSPLANKTON BLOOMS– AREAS WITH NO OXYGENAREAS WITH NO OXYGEN– DEAD ZONES (delta at base of Mississippi river)DEAD ZONES (delta at base of Mississippi river)
DDT IN SEDIMENTS
SEWAGE IN THE OCEANSEWAGE IN THE OCEAN THE GOOD NEWSTHE GOOD NEWS
– PATHOGENS DON’T BREED IN SEA WATERPATHOGENS DON’T BREED IN SEA WATER– MOST DO NOT SURVIVE VERY LONGMOST DO NOT SURVIVE VERY LONG– IF SEWAGE IS TREATED, HEALTH EFFECTS IF SEWAGE IS TREATED, HEALTH EFFECTS
ARE MINIMALARE MINIMAL
THE BAD NEWSTHE BAD NEWS– THEY ARE AROUND FOR A FEW DAYSTHEY ARE AROUND FOR A FEW DAYS– THEY ARE CONCENTRATED NEAR THEY ARE CONCENTRATED NEAR
OUTFALLS AND STORM DRAINSOUTFALLS AND STORM DRAINS– THEY CAUSE SIGNIFICANT AMOUNTS OF THEY CAUSE SIGNIFICANT AMOUNTS OF
DISEASE AND INFECTION TO SWIMMERS DISEASE AND INFECTION TO SWIMMERS FOLLOWING STORMS OR SEWAGE SPILLSFOLLOWING STORMS OR SEWAGE SPILLS
* Do not swim for two days after a rain* Do not swim for two days after a rain
DDTDDT CHEAPCHEAP EASY TO PRODUCEEASY TO PRODUCE KILLS A WIDE RANGE OF INSECTSKILLS A WIDE RANGE OF INSECTS IN ’60’S WAS RESPONSIBLE FOR IN ’60’S WAS RESPONSIBLE FOR
ENVIRONMENTAL DISASTERS:ENVIRONMENTAL DISASTERS:– SUBJECT TO BIOMAGNIFICATIONSUBJECT TO BIOMAGNIFICATION– EGGSHELL THINNING IN BIRDSEGGSHELL THINNING IN BIRDS– BROWN PELICANBROWN PELICAN– BALD EAGLEBALD EAGLE– PEREGRINE FALCONPEREGRINE FALCON
BIOLOGICAL MAGNIFICATION
DDT BANNEDDDT BANNED 1970, PRODUCTION OF DDT BANNED1970, PRODUCTION OF DDT BANNED HOWEVER, DDT REMAINS IN THE HOWEVER, DDT REMAINS IN THE
ENVIRONMENT FOR YEARSENVIRONMENT FOR YEARS SLOWLY BECOMING LESS SLOWLY BECOMING LESS
IMPORTANT AS IT BECOMES IMPORTANT AS IT BECOMES DEPOSITED IN BOTTOM SEDIMENTSDEPOSITED IN BOTTOM SEDIMENTS
NEW SUPERFUND SITE TO BURY THE NEW SUPERFUND SITE TO BURY THE SEDIMENTSSEDIMENTS
DDT Banned
PESTICIDESPESTICIDES NEWER INSECTICIDES HAVE SHORT LIFE NEWER INSECTICIDES HAVE SHORT LIFE
SPANS IN THE ENVIRONMENTSPANS IN THE ENVIRONMENT– BREAKDOWN PRODUCTS MAY BE TOXIC BREAKDOWN PRODUCTS MAY BE TOXIC – SOME ACUTELY TOXIC (poisonous)SOME ACUTELY TOXIC (poisonous)– DANGEROUS TO FARM WORKERS (sprayed on DANGEROUS TO FARM WORKERS (sprayed on
workers while in fields =miscarriages, infant and workers while in fields =miscarriages, infant and pre-mature death. Union fight won!!pre-mature death. Union fight won!!
SOME LEAVE RESIDUES ON FOODSOME LEAVE RESIDUES ON FOOD SOME INCORPORATED INTO FOODSSOME INCORPORATED INTO FOODS
– CHRONIC EXPOSURE IS A CONCERNCHRONIC EXPOSURE IS A CONCERN– Why people eat organic foods. Vs. 5lbs/yr of toxinsWhy people eat organic foods. Vs. 5lbs/yr of toxins
OIL SPILLS AND POLLUTION
Figure 18.7Figure 18.7
Result of an oil tanker spill
Hunting and Hunting and resultant resultant
Extinctions are Extinctions are part of our part of our heritageheritage
Figure 18.14Figure 18.14
TRADE IN RARE SPECIES
Figure 18.15Figure 18.15
Figure 19.4Figure 19.4INTRODUCTION OF EXOTIC
SPECIESTRANSPORTATION
THEN
Figure 19.2Figure 19.2NOW
Figure 18 p.422Figure 18 p.422
REEF RESOURCES
FOOD FROM THE REEF
THE AQUARIUM TRADE
Figure 18.3Figure 18.3Coral death-Bleaching-
(sedimentation, pollution, warmer temperatureCoral expels zooxanthellae—soon dies or
survives and re-incorporates
*GLOBAL CLIMATE CHANGE * RESEARCH ON ENVIRONMENT
But more than research is needed—what should be done…What do you think? Measures to be taken? Enforcement?
Coral reefs in crisis: blast/poison fishing, sedimentation, pollution. 16% lost past 5 years, another 27% threatened globally
Reef Check solution: train volunteer community teams to survey reef health and to manage local reefs on a global basis.
The Reef Check Foundation:Dedicated to Global Coral Reef
Education, Monitoring and Management
Since 1997, surveyed 1000 reefs in 50 countries. 4000 divers participated, 100s of scientists.
Supported by UNEP, GCRMN, US NOAA
MANAGEMENTMANAGEMENT
THE LONG-TERM NEEDSTHE LONG-TERM NEEDS
EDUCATE GLOBAL POPULATIONSEDUCATE GLOBAL POPULATIONS– ENVIRONMENTAL ISSUES ENVIRONMENTAL ISSUES – CONSEQUENCESCONSEQUENCES– LONG-TERM PLANNING LONG-TERM PLANNING – WHERE MOST POPULATION GROWTH IS WHERE MOST POPULATION GROWTH IS
OCCURING, WE NEED EDUCATION AND OCCURING, WE NEED EDUCATION AND ECONOMIC ALTERNATIVESECONOMIC ALTERNATIVES
WE NEED TO START AT WE NEED TO START AT HOMEHOME BY BY CREATING A GENERATION OF CREATING A GENERATION OF CONCERNED AND KNOWLEDGEABLE CONCERNED AND KNOWLEDGEABLE LEADERS— LEADERS— that means you!!that means you!!
OUR JOB!OUR JOB!