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Arvicoline Population Cycles

Mar 30, 2019

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Dicrostonyx torquatus (Arctic lemming). Arvicoline Population Cycles. Clethrionomys rufocanus (Gray red-backed vole). Schaffer & Tamarin 1972. Turchin & Batzli 2001. Note- thin line = vegetation, thick line = simulated rodent density. Mustela nivalis. The Chitty Hypothesis.

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Arvicoline Population Cycles

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Dicrostonyxtorquatus(Arctic lemming) Arvicoline Population Cycles Clethrionomysrufocanus(Gray red-backed vole)

Schaffer & Tamarin 1972
Turchin & Batzli 2001 Note- thin line = vegetation, thick line = simulated rodent density
Mustelanivalis
The Chitty Hypothesis
Multi-factorial models

Lecture Outline: Population Cycles

Lecture Outline: Population Cycles. Some history: beautiful hypotheses and ugly facts. How common are population cycles?. Components of cycles: periods and amplitudes. Questions and hypotheses. Case study: Snowshoe hares (Kluane Project).

872 views • 31 slides

Cycles

Cycles. Water, Carbon, Nitrogen Oxygen and Phosphorus. Water (hydrologic) Cycle. Plants absorb water from the soil Transpiration and respiration return water to the atmosphere Precipitation returns water to the soil Nonmetal oxides in the atmosphere combine with water to form acid rain.

578 views • 14 slides

Cycles

Cycles. Respiration , Photosynthesis , Evaporation and Condensation , The Weathering of Rock , and the Decay of Organic Matter. Evaporation. What is it? Evaporation- the process of when water is heated up and changes from liquid to a gas (water vapor).

344 views • 7 slides

Cycles

Cycles. Water Cycle. Water Cycle. Evaporation Water changing into gas Happens on the surface of a liquid Transpiration Water changing into gas Happens from leaves of plants Condensation Gas changing into liquid Precipitation Water falling from clouds. Water Cycle. Runoff

301 views • 10 slides

Cycles

Cycles. Contributions by: John L. Falconer &amp; Will Medlin Department of Chemical and Biological Engineering University of Colorado Boulder, CO 80309-0424 Supported by the National Science Foundation.

692 views • 25 slides

BioChemical Cycles

BioChemical Cycles. Biosphere. Carbon cycle. Phosphorus cycle. Nitrogen cycle. Water cycle. Oxygen cycle. Heat in the environment. Heat. Heat. Heat. Fig. 3-7, p. 55. 1. CO2 is taken in by plants and photosynthetic aquatic organisms. Carbon Cycle. 2. Plants are eaten by animals

622 views • 16 slides

Cycles

Cycles. Water Carbon Nitrogen. Nutrient Cycles. Energy transfer through an ecosystem is ONE WAY Most energy is lost as heat Nutrients such as nitrogen, water and carbon are able to cycle through an ecosystem and be reused. The Water Cycle. Water on earth moves in a continuous cycle.

285 views • 9 slides

Chap.18 Population Fluctuations and Cycles

Chap.18 Population Fluctuations and Cycles. Ecology 2000. Population Fluctuations and Cycles. 18.1 Populations fluctuate in density. 18.2 Temporal variation affects age structure in populations

682 views • 35 slides

Cycles

February 2012. Cycles. &amp;. Trends. An Overview to Energy Sector in Mexico. 2011-2012. Index. Chapter II. Energy Sector. Oil &amp; natural gas reserves Production Exports Scenarios Investments Pemex strategies. Chapter II Energy Sector. Reserves at January 1st , 2011.

499 views • 36 slides

Cycles

Cycles. CARBON-OXYGEN CYCLE. http://www.biology.ualberta.ca/facilities/multimedia//uploads/alberta/CarbonCycle.html http://www.windows.ucar.edu/earth/climate/carbon_cycle.html http://www.nodvin.net/snhu/SCI219/demos/Chapter_3/Chapter_03/Present/animations/51_1_2_1.html.

606 views • 20 slides

POPULATION CYCLES

POPULATION CYCLES. I. WHAT IS A CYCLE?. A. The Concept of Cycles multiannual fluctuations that occur with some regularity (periodicity). CYCLE CHARACTERISTICS. MORE CHARACTERISTICS OF CYCLES. Regional synchrony in fluctuations of coexisting species, Summer crashes in abundance

542 views • 34 slides

Prevention of Population Cycles by Parasite Removal

Prevention of Population Cycles by Parasite Removal. Peter J. Hudson, Andy P. Dobson and Dave Newborn. Who remembers population cycles?. Trichostrongylus tenuis. Lagopus lagopus scoticus. Parasites and the Red Grouse. Trichostrongylus tenius. Basic single host nematode life cycle.

359 views • 12 slides

Cycles

Life. Cycles. Life Cycles. Do you look the same as you did when you were younger? Or the same as your parents? Of course not! As you get older, you go through changes. Most living organisms change as they get older. They pass through changes from birth through death called life cycles.

670 views • 27 slides

POPULATION CYCLES

POPULATION CYCLES. I. WHAT IS A CYCLE?. A. The Concept of Cycles. CYCLE CHARACTERISTICS. MORE CHARACTERISTICS OF CYCLES. Regional synchrony in fluctuations of coexisting species, Summer crashes in abundance A gradual disappearance of cycles southward. I. WHAT IS A CYCLE?.

575 views • 33 slides

Cycles

Cycles. All organisms need water, minerals, and other life-sustaining materials to survive. Ex. Hydrologic – necessary for all life Ex. Carbon – backbone of organic compounds (carbs, lipids, proteins) Ex. Phosphorus – uprights of DNA ladder

188 views • 6 slides

Frame size and caribou population cycles: Does size matter?

Frame size and caribou population cycles: Does size matter?. Don Russell, Yukon College Craig Nicholson, Univ. Mass. Robert White, Institute Arctic Biology Anne Gunn, Salt Spring Islander. Relative herd sizes for wild Rangifer herds. Caribou herds cycle.

262 views • 23 slides

Population Growth Cycles and Stresses

Population Growth Cycles and Stresses. Chapter 35 Section 2. Population Growth. No Population Can Grow Indefinitely: J-Curves and S-Curves. Biotic potential – capacity for population growth under ideal conditions Larger organisms tend to have low potential

228 views • 20 slides

Cycles

Internal Energy (U): A measure of energy at a macroscopic level due to the molecular translation, vibration, rotation (an Extensive Property). Internal Energy (u) can also be expressed as an intensive property u=U/m (internal energy per unit mass).

406 views • 35 slides

Geochemical Cycles , Symbiosis, &amp; Population Growth

Geochemical Cycles , Symbiosis, &amp; Population Growth. Biogeochemical Cycles of matter. Unlike energy, matter is constantly being recycled in an ecosystem in what are known as biogeochemical cycles. Water Cycle : continuous flow of water on Earth: - Precipitation – rain, snow, sleet, hail

152 views • 11 slides

Cycles

Cycles. A series of processes which return a system to its initial state Heat engine: receives heat; does work Reversed cycle: cool or heat when work done on system. Limitations. &gt; 100% thermal efficiency Heat → cold?. Performance. Thermal efficiency Coefficient of performance Cooling

305 views • 24 slides

Population Growth Cycles and Stresses

Population Growth Cycles and Stresses. Chapter 5 Section 2. Population Growth. No Population Can Grow Indefinitely: J-Curves and S-Curves. Biotic potential – capacity for population growth under ideal conditions

295 views • 15 slides

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Arvicoline Population Cycles

Arvicoline Population Cycles

Presentation Transcript

Lecture Outline: Population Cycles

Cycles

Cycles

Cycles

Cycles

BioChemical Cycles

Cycles

Chap.18 Population Fluctuations and Cycles

Cycles

Cycles

POPULATION CYCLES

Prevention of Population Cycles by Parasite Removal

Cycles

POPULATION CYCLES

Cycles

Frame size and caribou population cycles: Does size matter?

Population Growth Cycles and Stresses

Cycles

Geochemical Cycles , Symbiosis, &amp;amp; Population Growth

Cycles

Population Growth Cycles and Stresses

Geochemical Cycles , Symbiosis, & Population Growth