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🧠 thoughts and ideas
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122 changes: 67 additions & 55 deletions docs/_tex/index.tex
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\date{2024-09-26}
\date{2024-09-27}

\usepackage{setspace}
\usepackage[left]{lineno}
Expand Down Expand Up @@ -579,28 +579,30 @@ \section{Network construction is
collection of interaction data is both costly {[}ref{]} and challenging
to execute in a way that captures the different processes (owing to the
different time and spatial scales they may be operating at). Thus we
often turn to using models to either predict the interaction between two
species {[}ref{]}, the structure of networks {[}ref{]}, or even as a
means to identify missing interactions (gap fill) within existing
empirical dataset (Biton et al., 2024; Stock, 2021), and so for the
purpose of this discussion network construction will be synonymous with
using a model as a means to represent or predict a network. Different
models have different underlying philosophies that often only capture
one or a few of the processes discussed in Section~\ref{sec-process},
has implications for how the resulting network is defined
Section~\ref{sec-anatomy}, which will ultimately delimit and define what
inferences can be made from the resulting network. Here we will
introduce the three different types of network representations, how they
link back to the different processes determining interactions
Figure~\ref{fig-process}, and broadly discuss some of the modelling
approaches that are used to construct these different network types.
This is paralleled by a hypothetical case study (Box 1) where we
showcase the utility/applicability of the different network
representation in the context of trying to understand the feeding
dynamics of a seasonal community.

\begin{tcolorbox}[enhanced jigsaw, leftrule=.75mm, rightrule=.15mm, opacityback=0, breakable, colframe=quarto-callout-note-color-frame, colbacktitle=quarto-callout-note-color!10!white, toprule=.15mm, arc=.35mm, opacitybacktitle=0.6, left=2mm, bottomtitle=1mm, titlerule=0mm, toptitle=1mm, title=\textcolor{quarto-callout-note-color}{\faInfo}\hspace{0.5em}{Box 1 - Why we need to aggregate networks at different scales: A
hypothetical case study}, colback=white, bottomrule=.15mm, coltitle=black]
often turn to models to either predict networks, be that the interaction
between two species, or its structure (Strydom, Catchen, et al., 2021),
or as a means to identify missing interactions (gap fill) within
existing empirical dataset (Biton et al., 2024; Stock, 2021), and so for
the purpose of this discussion network construction will be synonymous
with using a model as a means to represent or predict a network --- it
can be argued that even the collection of empirical data is in and of
itself a `model' as it is still only a \emph{representation} of the
system. Different models have different underlying philosophies that
often only capture one or a few of the processes discussed in
Section~\ref{sec-process}, has implications for how the resulting
network is defined Section~\ref{sec-anatomy}, which will ultimately
delimit and define what inferences can be made from the resulting
network. Here we will introduce the three different types of network
representations, how they link back to the different processes
determining interactions Figure~\ref{fig-process}, and broadly discuss
some of the modelling approaches that are used to construct these
different network types. This is paralleled by a hypothetical case study
(Box 1) where we showcase the utility/applicability of the different
network representation in the context of trying to understand the
feeding dynamics of a seasonal community.

\begin{tcolorbox}[enhanced jigsaw, colframe=quarto-callout-note-color-frame, coltitle=black, titlerule=0mm, breakable, opacityback=0, left=2mm, leftrule=.75mm, toprule=.15mm, rightrule=.15mm, arc=.35mm, title=\textcolor{quarto-callout-note-color}{\faInfo}\hspace{0.5em}{Box 1 - Why we need to aggregate networks at different scales: A
hypothetical case study}, bottomrule=.15mm, colbacktitle=quarto-callout-note-color!10!white, opacitybacktitle=0.6, bottomtitle=1mm, toptitle=1mm, colback=white]

Although it might seem most prudent to be predicting, constructing, and
defining networks that are the closest representation of reality there
Expand Down Expand Up @@ -715,21 +717,20 @@ \subsubsection{Models that predict realised networks (realised
entire diet breadth of a species) as well as then determine which
interactions are realised (\emph{i.e.,} incorporate the `cost' of
interactions). As far as we are aware there is no model that explicitly
accounts for the feasibility (evolutionary compatibility) between
species and rather \emph{only} accounts for processes that determine the
realisation of an interaction (\emph{i.e.,} abundance, predator choice,
or non-trophic interactions). Although the use of allometric scaling
\emph{i.e.,} body size (Beckerman et al., 2006; \emph{e.g.,} Valdovinos
et al., 2023) may represent a first step in capturing evolutionary
compatibility one still needs to account for other feeding traits. In
terms of models that do formalise these processes, diet models
(Beckerman et al., 2006; Petchey et al., 2008) have been used construct
networks based on both predator choice (as determined by the handling
time, energy content, and predator attack rate) as well as abundance
(prey density). Wootton et al. (2023) developed a model that moves the
energy of the system into different modules related to the process of
the predator acquiring energy from the prey \emph{i.e.,}
compartmentation in food webs (Krause et al., 2003).
accounts for both of these `rules' and rather \emph{only} account for
processes that determine the realisation of an interaction (\emph{i.e.,}
abundance, predator choice, or non-trophic interactions). Although the
use of allometric scaling \emph{i.e.,} body size (Beckerman et al.,
2006; \emph{e.g.,} Valdovinos et al., 2023) may represent a first step
in capturing evolutionary compatibility one still needs to account for
other feeding traits. In terms of models that do formalise these
processes, diet models (Beckerman et al., 2006; Petchey et al., 2008)
have been used construct networks based on both predator choice (as
determined by the handling time, energy content, and predator attack
rate) as well as abundance (prey density). Wootton et al. (2023)
developed a model that moves the energy of the system into different
modules related to the process of the predator acquiring energy from the
prey \emph{i.e.,} compartmentation in food webs (Krause et al., 2003).

\subsubsection{Models that predict structure (interaction
agnostic)}\label{models-that-predict-structure-interaction-agnostic}
Expand All @@ -751,14 +752,15 @@ \subsubsection{Models that predict structure (interaction
is either possible \emph{or} realised between two species (\emph{i.e.,}
one cannot use these models to determine if species \(a\) eats species
\(b\)). Although this means this suite of models are unsuitable as tools
for predicting interactions, they have been shown to be sufficient tools
to predict the structure of networks (Williams \& Martinez, 2008). And
provide a data-light (the models often only require species richness)
but assumption heavy (the resulting network structure is determined by
an assumption of network structure) way to construct a network.
for predicting species-specific interactions, they have been shown to be
sufficient tools to predict the structure of networks (Williams \&
Martinez, 2008), and provide a data-light (the models often only require
species richness) but assumption heavy (the resulting network structure
is determined by an assumption of network structure) way to construct a
network.

\section{Making Progress with Networks: Why Definitions
matter}\label{making-progress-with-networks-why-definitions-matter}
\section{Making Progress with
Networks}\label{making-progress-with-networks}

\subsection{Further development of models and
tools}\label{further-development-of-models-and-tools}
Expand All @@ -785,10 +787,15 @@ \subsection{Further development of models and
showcasing the use of models to disentangle the drivers of community
function and Strydom, Dalla Riva, et al. (2021) who identified that
networks are less complex than they could be, suggesting that there are
constraints on network assembly.
constraints on network assembly. In addition to the more intentional
development of models we also need to consider the validation of these
models, There have been developments and discussions for assessing how
well a model recovers pairwise interactions (Poisot, 2023; Strydom,
Catchen, et al., 2021) but we lack any clear strategies for benchmarking
the ability of models to recover structure (Allesina et al., 2008).

\subsubsection{At what scale should we be predicting/using
networks?}\label{at-what-scale-should-we-be-predictingusing-networks}
\subsubsection{At what scale should we be predicting and using
networks?}\label{at-what-scale-should-we-be-predicting-and-using-networks}

Look at Hutchinson et al. (2019)

Expand All @@ -811,14 +818,14 @@ \subsubsection{At what scale should we be predicting/using
will influence network dynamics (Rooney et al., 2008). There is also a
bit of an interplay with time and data and the different scales that
they may be integrated at - co-occurrence may span decades and just
because two species have been recorded in teh same space does not mean
because two species have been recorded in the same space does not mean
it was at the same timescale (Brimacombe et al., 2024)

\subsubsection{Feasible, realised, or
sustainable?}\label{feasible-realised-or-sustainable}

When do we determine a link to be `real'\ldots{} In the context of
feasible networks this is perhaps clearer - if all things were equal
metawebs this is perhaps clearer - if all things were equal
(\emph{i.e.,} community context is irrelevant) would the predator be
able to consume the prey. However in the realised space there is also
the question of the long term `energetic feasibility' of an interaction
Expand All @@ -841,11 +848,11 @@ \subsection{How should we use different
function (although see Delmas et al., 2019). That being said one of the
most important things we can do is to be aware of the parameter space
that is possible given a specific definition of a network and operate
within those parameters. And we should use this in how we also
evaluate/benchmark the performance of the different models as well;
Poisot (2023) presents a set of guidelines for assessing how well a
model recovers pairwise interactions but we lack any clear strategies
for benchmarking structure.
within those parameters. Here we can maybe tie it back to scale -
specifically the idea that the fact that metawebs operate at
evolutionary scales they are not suitable for `dynamic' processes,
although they do have the potential to think about novel species
entering the network/community\ldots{}

\section{Concluding remarks}\label{concluding-remarks}

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\phantomsection\label{refs}
\begin{CSLReferences}{1}{0}
\bibitem[\citeproctext]{ref-allesinaGeneralModelFood2008}
Allesina, S., Alonso, D., \& Pascual, M. (2008). A {General Model} for
{Food Web Structure}. \emph{Science}, \emph{320}(5876), 658--661.
\url{https://doi.org/10.1126/science.1156269}

\bibitem[\citeproctext]{ref-allesinaFoodWebModels2009}
Allesina, S., \& Pascual, M. (2009). Food web models: A plea for groups.
\emph{Ecology Letters}, \emph{12}(7), 652--662.
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isbn = {978-0-691-02128-7}
}

@article{huiHowInvadeEcological2019,
title = {How to {{Invade}} an {{Ecological Network}}},
author = {Hui, Cang and Richardson, David M.},
year = {2019},
month = feb,
journal = {Trends in Ecology \& Evolution},
volume = {34},
number = {2},
pages = {121--131},
issn = {0169-5347},
doi = {10.1016/j.tree.2018.11.003},
urldate = {2024-09-27},
abstract = {Invasion science is in a state of paradox, having low predictability despite strong, identifiable covariates of invasion performance. We propose shifting the foundation metaphor of biological invasions from a linear filtering scheme to one that invokes complex adaptive networks. We link invasion performance and invasibility directly to the loss of network stability and indirectly to network topology through constraints from the emergence of the stability criterion in complex systems. We propose the wind vane of an invaded network -- the major axis of its adjacency matrix -- which reveals how species respond dynamically to invasions. We suggest that invasion ecology should steer away from comparative macroecological studies, to rather explore the ecological network centred on the focal species.},
file = {/Users/tanyastrydom/Zotero/storage/F2YPA5YH/S016953471830274X.html}
}

@article{hutchinsonSeeingForestTrees2019,
title = {Seeing the Forest for the Trees: {{Putting}} Multilayer Networks to Work for Community Ecology},
shorttitle = {Seeing the Forest for the Trees},
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