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In Situ
Preserving biodiversity in the nature environment where organisms have evolvede
Ex situ
Protection and management of biodiversity in artificial, human-built environment
How are relationships complementary for species?
Wild–>captivity: populations provide “insurance” that species will remain Captivity–>wild: reintroduction and funding flow back to nature
Evolution of zoos and aquarium
Menageries (symbols of wealth and kept to entertain the rich), zoological parks (living museums focused on showing of animals), conservation centers (holistic focus on well-being and ecosystems
Botanical gardens vs. arboretums
Botanical: gardens dedicated to collection and preservation of variety of plant Arboretum: special botanical garden for trees and woody plants
Botanical gardens
Hold 41% of threatened plant species, byt more gardens are found in the north even though most diversity is in the tropics
Gene banks
biorepositories preserving genetic material (gametes and DNA) in cyro for long-term storage of genetic diversity – source material for artificial insemination
Seed bank
Storing seeds in cold, dry conditions to slow metabolism, stores over 1 million seed samples as global background
The Nagoya Protocol (2010)
Addressed the issue of biopiracy and ownership of genetic resources by ensuring countries control access to their own biological diversity and profit/research must be shared fairly with source country
Captive breeding & Artificial reproductive technologies
Captive breeding: maintaining reproducing populations in artificial environments (cross-fostering: using surrogate parents & double-clutching: inducing a second egg lay) Artificial reproductive technologies: artificial insemination (animals that won’t mate), IVF (fertilization outside the body + surrogate), and de-extinction (controversial attempts to resurrect species)
Genetic constraints for small populations in captivity
Small populations (vulnerable to genetic drift and bottleneck), inbreeding (mating between relatives reduced fitness) Solution: studbooks (records of lineages of purebred species) and species survival plans (breeding program to maintain healthy, genetically diverse populations of threatened or endangered species)
Challenges: adaption and welfare In captivity
Adaption to captivity: selection of traits maladaptive in the wild Animal welfare: small enclosures can cause stress (carnivores struggle the most)
Reintroduction
Releasing individuals into historical range to create a new population
Reinforcement
Releasing individuals into an existing population to help size and genetics
Headstarting
Raising animals and plants past their vulnerable young stage to eliminate early mortality
Soft-release
gradual acclimation (shelter, extra food) has a higher success rate
Hard release
Chuck them into the wild to fend for themselves (shock/predation)
Behavioral training
Solution to imprinting: puppet feeding (prevents chicks from imprinting on humans) predator training (teaching animals to fear their natural predators)
Comparing challenges Keeping animals vs plants captive
Plants: high densities are okay, no training needed, seeds store easily Animals: need large territories, risk of printing, require constant care
Monitoring the landscape
Before managing a landscape we must quantify its compostion and heavily relies on remote sensing tech Satellite Remote Sensing: using platforms like landsat to track land cover changes with high temporal frequently (often, frequently) Aerial Imagery: high-res photos increasingly gathered by unmanned aerial vehicles (UAVs) allowed for detailed habitat at lower costs
Composition Metrics How can you look at an area and determines in composition?
Proportion of habitat (Pi): the percentage of the landscape occupied by specific habitat type Diversity indices: Using simpson’s (Ds) or shannon’s (H) indices to measure the habitat’s heterogeneity
Configuration metrics How are species spread?
Contagion: measure how clumped or fragmented habitat types are High = aggregated/clumped low= dispersed/fragmented
Adjacency
The probability that two specific habitat types (urban forest) are next to each other, influences edge effects
Ecosystem Based Management (EBM)
Manages cumulative impacts of all sectors, considers the full array of interactions (including humans), and managed by watershed or ecosystems