Kategori: Ukategorisert
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5.4 Statistical methods appiled to biodiversity
Today we will talk about statistics applied to biodiversity During this course, we talk a lot about indices and measures of biodiversity, and we mentioned some statistical concept and tests that can be applied to the study of biological diversity. Today, I will show you some of them, and how…
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5.3 Qualitative measures of biodiversity
Today we will talk about qualitative measures of biodiversity. First of all, we need to ask what is the purpose of the research. Because we can have different ideas on what we want to collect and for which purposes. One of the main reason the qualitative research in fact is…
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5.2 Taxonomic and phylogenetic diversity
Today, we will talk about taxonomic and phylogenetic diversity. The estimation of taxonomic diversitycan be used fully in genetic and evolutionary status, or while comparing communities with the same number of species and individuals. Also, the calculation may be complex ifthe evolution information of the that consider the community are…
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5.1 Functional diversity
Today, we will talk about functional diversity. Functional diversity is very use fulif the comparison between two or more communities this samples contain hypothetically the same number of individuals per species, and the same quantity of species. In this case, there would be no difference at all, and it will lead to…
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4.5 How to analyse anthropogenic impact on biodiversity
Today we will see how to analyze anthropogenic impacts on biodiversity. What are anthropogenic impacts on biodiversity. For instance we have deforestation, that’s a very big problem. We have over fishing, pollution, water pollution, garbage pollution. So a different way to impact biological diversity. To analyze this impact, we have different methods. There are…
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4.4 How to compare communities diversity
Today I’m going to explain to you howto compare communities diversity. To be able to compare community, we first need to understand what to count as an abundance, because we can count different things. For instance, we can count the number of individuals, but in some cases, one for instance, we have trees…
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4.3 Curves of biodiversity
There are different ways torepresent biodiversity on a graph. One other way to represent biodiversityin a graph is the k dominance curve. K-dominance curve is a powerful tool for measuring abundance trendsin communities over time. K-dominance curve are the cumulative rankin abundance against the log species rank. In the graph…
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4.2 Species abundance models
Today we will talk about species abundance models. There are different types of evenness. Type of different patternsare called species abundance models. There are four main types, one isthe geometric series, the second one is the log series, then we have log-normalseries, and broken stick model. We see that there…
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4.1 Eveness
Hi, guys. Welcome to a new lecture of the course Biological Diversity, Theories, Measures and Data Sampling Techniques. Today, we will talk about evenness. First of all, we need to define what is evenness. Evenness is just the answer of the question how equally abundant are each of the species.…
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3.4 Beta-diversity
Hi, guys. Welcome to the fifth lecture of my course Biological Diversity, Theories, Measure, and Data Sampling Techniques. Today we will talk about beta-diversity. Beta-diversity is just diversity among samples. There are some relation who link beta, alpha, and gamma-diversity. For instance, gamma-diversity can bea sum of alpha and beta-diversity,…
Mathieu GT 