Energy Money Peak Oil Land Food Water Sewage Space Travel Third Exam Thursday 3 December 2015...
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Transcript of Energy Money Peak Oil Land Food Water Sewage Space Travel Third Exam Thursday 3 December 2015...
![Page 1: Energy Money Peak Oil Land Food Water Sewage Space Travel Third Exam Thursday 3 December 2015 Chapters 11-15, 17-18 plus 8 readings Final Exam 9 December.](https://reader036.fdocuments.us/reader036/viewer/2022070411/56649f4e5503460f94c702c6/html5/thumbnails/1.jpg)
Energy Money Peak Oil Land Food Water SewageSpace Travel
Third Exam Thursday 3 December 2015Chapters 11-15, 17-18 plus 8 readings
Final Exam9 December 2-5 PM
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Microbiome, antibiotics, Germs R us, appendix =“bomb shelter”
Challenges facing Parasites, hosts as islands, how to infect new ones?
Host specificity, high fecundities, exploitation of vectors (mosquitoes)
Intermediate and final hosts, host altered behavior (rabies, etc.)
Assassin bugs (Triatoma), contact, blood sucking, Chagas’s Disease
Malaria (Plasmodium), fever
Tapeworms (Cestodes), Nematodes (roundworms)
Cholera (Shigella) transmission via dysentery, water borne
Toilet seats, elevator buttons, door knobs, shopping carts...etc.
Getting into and out of a public restroom safely
Molecular mimicry: “eclipsed antigens” resemble host antigens
hence do not elicit formation of host antibodies
Major Histocompatibility Complex (MHC), identity of self, immune response
Trypanosoma shed coats, change antigens
Filariasis Elephantiasis (lymph nodes blocked by nematodes carried by mosquitoes)
Botflies
Dracunculus medinensis, caduceus symbol of medicine
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Evolution of Virulence (benign parasites allow hosts to live)
Host altered behavior
Rabies virus — rabid animals bite, passes on virus to new host
Lancet fluke Trematode Dicrocoelium dentriticum
Cercaria —> Metacercariae encyst on ant’s brain
Sheep ingest an ant and get infected
Starlings, Pill bugs, and Acanthocephalans
Ducks, Amphipods, and Acanthocephalans
STDs ——> increased sexual activity?
Ectoparasites (fleas, ticks, lice), endoparasites
Social parasites (thievery, brood parasitism)
Parasitoids: Ichneumonid wasps ————>
Microparasites —> macroparasites —> parasitoids —> predator spectrum
and many correlates thereof, such as relative sizes, rates of increase,
number of parasites per host, virulence, stability, and ability to
regulate lower trophic level
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Coevolution
Joint evolution of two (or more) taxa that have close ecological relationships but do not exchange genes, and in which reciprocal selective pressures operate to make the evolution of either taxon partially dependent on the evolution of the other
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EnterobiusPinworms(Parasiteson Primates)
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Parallel phylogeniesBrooks and Glen 1982
Primate hosts
Enterobius species
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Drosophila pachea and senita cactus.
Danaid butterflies use polyuridine alkaloids as chemical precursors for synthesis of pheromones used in attracting mates.
An arginine mimic, l-canavavine, present in many legumes,ruins protein structure in most insects.However, a bruchid beetle has evolved metabolic machinerythat enable it to use plants containing canavanine.
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Wild ginger, Asarum caudatum, in western Washington arepolymorphic for growth rate, seed production, and palatabililty toa native slug, Ariolimax columbianus (Cates 1975). Where slugs are uncommon, plants allocate more energy togrowth and seed production and less to production of antiherbivorechemicals. In habitats with lots of slugs, less palatable plants have a fitness advantage — even though they grow more slowly, theylose less photosynthetic tissue to slug herbivory.
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Some of the Suggested Correlates of Plant Apparency _____________________________________________________________________________ Apparent Plants Unapparent Plants _____________________________________________________________________________ Common or conspicuous Rare or ephemeralWoody perennials Herbaceous annualsLong leaf life span Short-lived leavesSlow growing, competitive species Faster growing, often fugitive speciesLate stages of succession, climax Early stages of succession, second growth
Bound to be found by herbivores Protected from herbivores by escape in (cannot escape in time and space) time and space (but still encountered by
wide-ranging generalized herbivores)
Produce more expensive quantitative Produce inexpensive qualitative chemical(broad-based) antiherbivore defenses defenses (poisons or toxins) to discourage(tough leaves, thorns, tannins) generalized herbivores
Quantitative defenses constitute Qualitative defenses may be broken downeffective ecological barriers to her- over evolutionary time by coevolution ofbivores, although perhaps only a weak appropriate detoxification mechanisms inevolutionary barrier unless supple- herbivores (host plant-specific herbivoremented with qualitative defenses species result)_____________________________________________________________________________
Paul Feeny
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Daniel Janzen
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Pine squirrels (Tamiasciurus) andconiferous food trees (Smith 1970)
Squirrels are very effective seed predators, stockpile conesTrees reduce squirrel effectiveness in many different ways:1. Cones difficult for squirrels to reach, open, or carry2. Putting fewer seeds in each cone (fake cones without any seeds)3. Increasing thickness of seed coats (seeds harder to harvest)4. Putting less energy into each seed (smaller seeds)5. Shedding seeds from cones early, before young squirrels forage6. Periodic cone crop failures decimate squirrel populations
Individual trees out of synchrony would set fewer seeds and thusbe selected against.
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Community and Ecosystem Ecology
Macrodescriptors = Aggregate Variables
Trophic structure, food webs, connectance, rates of energy fixation and flow, ecological
efficiency, species diversity, stability, relative importance curves,
guild structure, successional stages
Communities are not designed by natural selection
for smooth and efficient function, but arecomposed of many antagonists (we need toattempt to understand them in terms of
interactionsbetween individual organisms)
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Energy Flow and Ecological Energetics
Gross Productivity = rate at which plants capture
solar energy
Gross annual production (GAP)
Net productivity = gross productivity minus
respiration losses
Net annual production (NAP)
Respiration in tropical rainforest 75-80% of GAP
Respiration in temperate forests 50-75% of GAP
In most other communities, it is 25-50 % of GAP
Only about 5-10% of plant food is harvested by
animals
Remainder of NAP is consumed by decomposers
Biogeochemical cycles
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Hydrologic Cycle
Biogeochemical Cycle for Calcium
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CompartmentationTrophic Levels
Autotrophs = producers Heterotrophs = consumers &
decomposersPrimary carnivores = secondary
consumersSecondary carnivores = tertiary
consumersTrophic continuumHorizontal versus vertical
interactionsWithin and between trophic
levels
Guild StructureFoliage gleaning insectivorous
birds
Food WebsSubwebs, sink vs. source food
websConnectance [n (n-1)] / 2
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Energy Flow and Ecological Energetics
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Energy Flow and Ecological Energetics
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Energy Flow and Ecological Energetics
At equilibrium (di/dt = 0 for all i), energy
flow in the system portrayed in the figure may
thus be represented by a set of simple
equations (with inputs on the left and rate of
outflow to the right of the equal signs):
10 = 01 + 02 + 03 + 04
10 = 21 + 01 + 41
21 = 32 + 02 + 42
32 = 03 + 43
41 + 42 + 43 = 04
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Systems Ecology
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Food Web
Paine (1966)
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Food Web
Bottom Line
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Kirk Winemiller
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Ecological Pyramids (numbers, biomass, and energy)
Pyramid of energy
Measures of standing crop versus rates of flow
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Secondary Succession
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Institute Woods in Princeton
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Transition Matrix for Institute Woods in Princeton
_________________________________________________________________________Canopy Sapling Species (%)Species BTA GB SF BG SG WO OK HI TU RM BE Total __________________________________________________________________________
BT Aspen 3 5 9 6 6 - 2 4 2 60 3 104Gray birch - - 47 12 8 2 8 0 3 17 3 837Sassafras 3 1 10 3 6 3 10 12 - 37 15 68Blackgum 1 1 3 20 9 1 7 6 10 25 17 80Sweetgum - - 16 0 31 0 7 7 5 27 7 662White Oak - - 6 7 4 10 7 3 14 32 17 71Red Oak - - 2 11 7 6 8 8 8 33 17 266Hickory - - 1 3 1 3 13 4 9 49 17 223Tuliptree - - 2 4 4 - 11 7 9 29 34 81Red Maple - - 13 10 9 2 8 19 3 13 23 489Beech - - - 2 1 1 1 1 8 6 80 405__________________________________________________________________________BTA in next generation = 0.03 BTA + 0.03 SF + 0.01 BG . Grand Total = 3286
Henry Horn
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Distributions of Trees Observed in 4 Forests and Predicted Climax__________________________________________________________________ __________________ Age (years) BTA GB SF BG SG WO OK HI TU RM BE __________________________________________________________________ __________________
25 0 49 2 7 18 0 3 0 0 20 1 65 26 6 0 45 0
0 12 1 4 6 0 150 - - 0 1 5
0 22 0 0 70 2 350 - - - 6 - 3 - 0 14 1 76
Predicted climax 0 0 2 3 4 2 4 6 6 10 63__________________________________________________________________ __________________
Data from theInstitute Woods in Princeton (Horn 1975)
Henry Horn
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Diversity and Community Stability
Saturation with Individuals and with Species
Species Diversity = Biodiversity
Species Density or Species Richness
Relative Importance
Equitability
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Janzen’s Seedling Ring HypothesisTamiasciurus squirrel seed predation
Community and Ecosystem EcologyMacrodescriptors = Aggregate Variables
Compartment models, trophic structure, food webs, connectance, rates of energy fixation and flow,
biogeochemical cycles, ecological energetics, ecological efficiency, trophic continuum, guild structure,
ecological pyramids, successional stages, transition matrix,
species diversity, stability, relative importance curves.
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Diversity and Community Stability
Saturation with Individuals and with Species
Species Diversity = Biodiversity
Species Density or Species Richness
Relative Abundance/Importance
Equitability
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Species Diversity, Relative Abundance
Species Site A Site B A 10 91 B 10 1 C 10 1 D 10 1 E 10 1 F 10 1 G 10 1 H 10 1 I 10
1 J 10
1
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Relative Abundance / Importance
Ways two systems can differ in diversity
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All 10 Sites: Total Number of lizards: 20,990
Total numbers of lizards of 67 species collected on 10 desert study sites from1966-2008 plotted against their ranks inrelative abundance. The 12 most common species (blue) are named, along with 7 of the 54 less common to rare species (red). Samples exceed 30 for 48 of the 67 species.
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Discriminant function analysis showing clear separation of rare species based on 10 ecological variables including body size, clutch size, niche breadths and overlaps for diet, microhabitat, and habitat.