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#'Decreasing temperature and stabilization
#'
#'
#'
#' @description This function allows simulating the effect of a decrease in environmental
#' temperature, which stabilizes at a specific temperature (temp_stabilization),
#' on the abundance of ectotherm populations.
#'
#'
#'@param y_ini Initial population values (must be written with its name: N).
#'@param temp_ini Initial temperature.
#'@param temp_cmin Minimum critical temperature.
#'@param temp_cmax Maximum critical temperature.
#'@param ro Population growth rate at optimum temperature.
#'@param lambda Marginal loss by non-thermodependent intraspecific competition.
#'@param temp_stabilization Stabilization temperature.
#'@param q Temparature increase factor.
#'@param time_start Start of time sequence.
#'@param time_end End of time sequence.
#'@param leap Time sequence step.
#'
#'
#'@details Three populations and/or scenarios can be simulated simultaneously. A logistic
#' type function determines the temperature trend. The temperature decreases and
#' then stabilizes a given value. In each input vector, the parameters for the
#' three simulations must be specified (finite numbers for the initial population
#' abundance). The simulations are obtained by a model that incorporates the effects
#' of temperature over time, which leads to a non-autonomous ODE approach. This is
#' function uses the ODE solver implemented in the package deSolve (Soetaert et al., 2010).
#'
#'
#'@return (1) A data.frame with columns having the simulated trends.
#'@return (2) A two-panel figure in which (a) shows the population abundance curves
#' represented by solid lines and the corresponding carrying capacities
#' are represented by shaded areas. In (b) the temperature trend is shown.
#' The three simultaneous simulations are depicted by different colors, i.e.
#' 1st brown, 2nd green and 3rd blue.
#'
#'@references Soetaert, K., Petzoldt, T., & Setzer, R. (2010). Solving Differential Equations
#' in R: Package deSolve. Journal of Statistical Software, 33(9), 1 - 25.
#' doi:http://dx.doi.org/10.18637/jss.v033.i09
#'
#'@export
#'@examples
#'
#'#######################################################################
#' #Example 1: Different initial population abundances.
#'#######################################################################
#'
#'decreasing_stabilization(y_ini = c(N = 100, N = 200, N = 400),
#' temp_ini = rep(26,3),
#' temp_cmin = rep(18,3),
#' temp_cmax = rep(30,3),
#' ro = rep(0.7,3),
#' lambda = rep(0.00005,3),
#' temp_stabilization = rep(19,3),
#' q = rep(0.03,3),
#' time_start = 2005,
#' time_end = 2100,
#' leap = 1/12)
#'
#'#######################################################################
#' #Example 2: Different thermal tolerance ranges.
#'#######################################################################
#'
#'temp_cmin3 <- 18
#'temp_cmin2 <- 10/9*temp_cmin3
#'temp_cmin1 <- 10/9*temp_cmin2
#'
#'temp_cmax1 <- 32.4
#'temp_cmax2 <- 10/9*temp_cmax1
#'temp_cmax3 <- 10/9*temp_cmax2
#'
#'decreasing_stabilization(y_ini = c(N = 100, N = 100, N = 100),
#' temp_ini = rep(32,3),
#' temp_cmin = c(temp_cmin1,temp_cmin2,temp_cmin3),
#' temp_cmax = c(temp_cmax1,temp_cmax2,temp_cmax3),
#' ro = rep(0.7,3),
#' lambda = rep(0.00005,3),
#' temp_stabilization = rep(19,3),
#' q = rep(0.03,3),
#' time_start = 2005,
#' time_end = 2100,
#' leap = 1/12)
#'\donttest{
#'#######################################################################
#' #Example 3: Different relationships between initial environmental
#' # temperature and optimum temperature.
#'#######################################################################
#'
#'temp_cmin <- 18
#'temp_cmax <- 30
#'
#'# Temperature at which performance is at its maximum value.
#'temp_op <- (temp_cmax+temp_cmin)/3+sqrt(((temp_cmax+temp_cmin)/3)^2-
#' (temp_cmax*temp_cmin)/3)
#'
#'temp_ini1 <- (temp_cmin+temp_op)/2
#'temp_ini2 <- temp_op
#'temp_ini3 <- (temp_op+temp_cmax)/2
#'
#'decreasing_stabilization(y_ini = c(N = 100, N = 100, N = 100),
#' temp_ini = c(temp_ini1,temp_ini2,temp_ini3),
#' temp_cmin = rep(temp_cmin,3),
#' temp_cmax = rep(temp_cmax,3),
#' ro = rep(0.7,3),
#' lambda = rep(0.00005,3),
#' temp_stabilization = rep(19,3),
#' q = rep(0.03,3),
#' time_start = 2005,
#' time_end = 2100,
#' leap = 1/12)
#'
#'#######################################################################
#' #Example 4: Different stabilizing temperature.
#'#######################################################################
#'
#'temp_stabilization1 <- 18
#'temp_stabilization2 <- 10/9*temp_stabilization1
#'temp_stabilization3 <- 10/9*temp_stabilization2
#'
#'decreasing_stabilization(y_ini = c(N = 100, N = 100, N = 100),
#' temp_ini = rep(26,3),
#' temp_cmin = rep(18,3),
#' temp_cmax = rep(30,3),
#' ro = rep(0.7,3),
#' lambda = rep(0.00005,3),
#' temp_stabilization = c(temp_stabilization1,
#' temp_stabilization2,
#' temp_stabilization3),
#' q = rep(0.03,3),
#' time_start = 2005,
#' time_end = 2100,
#' leap = 1/12)
#'
#'#######################################################################
#' #Example 5: Different marginal losses by a non-thermodependent
#' # component of intraspecific competition.
#'#######################################################################
#'
#'lambda3 <- 0.01
#'lambda2 <- 1/2*lambda3
#'lambda1 <- 1/2*lambda2
#'
#'
#'decreasing_stabilization(y_ini = c(N = 100, N = 100, N = 100),
#' temp_ini = rep(26,3),
#' temp_cmin = rep(18,3),
#' temp_cmax = rep(30,3),
#' ro = rep(0.7,3),
#' lambda = c(lambda1,lambda2,lambda3),
#' temp_stabilization = rep(19,3),
#' q = rep(0.03,3),
#' time_start = 2005,
#' time_end = 2100,
#' leap = 1/12)
#'}
###################################################
decreasing_stabilization<- function(y_ini = c(N = 400, N = 400, N = 400),
temp_ini = rep(35,3),
temp_cmin = rep(18,3),
temp_cmax = c(25,28,32),
ro = rep(0.7,3),
lambda = rep(0.00005,3),
temp_stabilization = rep(25,3),
q = rep(0.03,3),
time_start = 2005,
time_end = 2100,
leap = 1/12){
times<- seq(time_start, time_end, leap)
if(temp_cmin[1]<temp_cmax[1] && temp_cmin[2]<temp_cmax[2] && temp_cmin[3]<temp_cmax[3] ){
if(temp_cmin[1]<=temp_ini[1] && temp_ini[1]<=temp_cmax[1] && temp_cmin[2]<=temp_ini[2] && temp_ini[2]<=temp_cmax[2] && temp_cmin[3]<=temp_ini[3] && temp_ini[3]<=temp_cmax[3]){
DE <- function (times,temp_ini,temp_stabilization,q) {
T <- (temp_stabilization*temp_ini)/(temp_ini+(temp_stabilization-temp_ini)*exp(-q*(times-time_start)))
}
##########################################################
# Optimum growing temperature
##########################################################
temp_op1<- (temp_cmax[1]+temp_cmin[1])/3+sqrt(((temp_cmax[1]+temp_cmin[1])/3)^2-(temp_cmax[1]*temp_cmin[1])/3)
temp_op2<- (temp_cmax[2]+temp_cmin[2])/3+sqrt(((temp_cmax[2]+temp_cmin[2])/3)^2-(temp_cmax[2]*temp_cmin[2])/3)
temp_op3<- (temp_cmax[3]+temp_cmin[3])/3+sqrt(((temp_cmax[3]+temp_cmin[3])/3)^2-(temp_cmax[3]*temp_cmin[3])/3)
##########################################################
# Time
##########################################################
time_op1= suppressWarnings( -1/q[1]*log((temp_ini[1]/(temp_ini[1]-temp_stabilization[1]))*(1-temp_stabilization[1]/temp_op1))+time_start)
time_cmin1=suppressWarnings(-1/q[1]*log((temp_ini[1]/(temp_ini[1]-temp_stabilization[1]))*(1-temp_stabilization[1]/temp_cmin[1]))+time_start)
#########################################################
time_op2= suppressWarnings(-1/q[2]*log((temp_ini[2]/(temp_ini[2]-temp_stabilization[2]))*(1-temp_stabilization[2]/temp_op2))+time_start)
time_cmin2=suppressWarnings(-1/q[2]*log((temp_ini[2]/(temp_ini[2]-temp_stabilization[2]))*(1-temp_stabilization[2]/temp_cmin[2]))+time_start)
##########################################################
time_op3= suppressWarnings(-1/q[3]*log((temp_ini[3]/(temp_ini[3]-temp_stabilization[3]))*(1-temp_stabilization[3]/temp_op3))+time_start)
time_cmin3=suppressWarnings(-1/q[3]*log((temp_ini[3]/(temp_ini[3]-temp_stabilization[3]))*(1-temp_stabilization[3]/temp_cmin[3]))+time_start)
#########################################################
##########################################################
# Time limits
##########################################################
tm<-c(time_cmin1[1],time_cmin2[1],time_cmin3[1])
tm_new <- tm
tm_new[is.nan(tm_new)] <- times[length(times)]
if(times[length(times)]<tm_new[1]){
tm_new[1]=times[length(times)]
}
if(times[length(times)]<tm_new[2]){
tm_new[2]=times[length(times)]
}
if(times[length(times)]<tm_new[3]){
tm_new[3]=times[length(times)]
}
##########################################################
# Parameters
##########################################################
parms1<-c(temp_cmin[1],temp_ini[1],temp_cmax[1],temp_op1,ro[1],lambda[1])
parms2<-c(temp_cmin[2],temp_ini[2],temp_cmax[2],temp_op2,ro[2],lambda[2])
parms3<-c(temp_cmin[3],temp_ini[3],temp_cmax[3],temp_op3,ro[3],lambda[3])
##############################################
##########################################################
# Model for each trend
##########################################################
model1 <- function (times, y,parms1) {
with(as.list(c(y)), {
T <- DE(times,temp_ini[1],temp_stabilization[1],q[1])
r1<- rate_TPC(T,ro[1],temp_cmin[1],temp_cmax[1],temp_op1)
dN <- r1 * N * (1 - lambda[1]*(N / r1))
list(dN,T,r1) })
}
###############################################################
model2 <- function (times, y,parms2) {
with(as.list(c(y)), {
T <- DE(times,temp_ini[2],temp_stabilization[2],q[2])
r2<- rate_TPC(T,ro[2],temp_cmin[2], temp_cmax[2],temp_op2)
dN <- r2 * N * (1 - lambda[2]*(N / r2))
list(dN,T,r2) })
}
###############################################################
model3 <- function (times, y,parms3) {
with(as.list(c(y)), {
T <- DE(times,temp_ini[3],temp_stabilization[3],q[3])
r3<- rate_TPC(T,ro[3],temp_cmin[3],temp_cmax[3],temp_op3)
dN <- r3 * N * (1 - lambda[3]*(N / r3))
list(dN,T,r3)})
}
###############################################################
# Solution
##############################################################
out1 <- ode(y=y_ini[1], times, model1, parms1, method = "ode45")
out2 <- ode(y=y_ini[2], times, model2, parms2, method = "ode45")
out3 <- ode(y=y_ini[3], times, model3, parms3, method = "ode45")
#############################################################
###############################################################
# Temperature trend
##############################################################
da1<-data.frame('x'=times,'y'=out1[,3] )
da2<-data.frame('x'=times,'y'=out2[,3] )
da3<-data.frame('x'=times,'y'=out3[,3] )
###############################################################
# Abundance
##############################################################
data1<-data.frame('x'=times,'y'=out1[,2] )
data2<-data.frame('x'=times,'y'=out2[,2] )
data3<-data.frame('x'=times,'y'=out3[,2] )
###############################################################
# Carrying capacity
##############################################################
K1=out1[,4]/lambda[1]
K2=out2[,4]/lambda[2]
K3=out3[,4]/lambda[3]
dat1<-data.frame('x'=times,'y'=K1 )
dat2<-data.frame('x'=times,'y'=K2 )
dat3<-data.frame('x'=times,'y'=K3 )
###############################################################
# Data
###############################################################
Data<- data.frame(times,out1[,3],out1[,2],K1,out2[,3],out2[,2],
K2,out3[,3],out3[,2],K3)
names(Data)<- c("Time","Temperature Scenario 1","Abundance scenario 1",
"Carrying capacity scenario 1","Temperature scenario 2",
"Abundance scenario 2","Carrying capacity scenario 2",
"Temperature scenario 3","Abundance scenario 3","Carrying
capacity scenario 3")
u<- formattable(Data, align = c("l", rep("r", NCOL(Data))))
print(u)
###############################################################
# Plots
##############################################################
data<-rbind(data1,data2,data3,dat1,dat2,dat3,da1,da2,da3)
p1 <- ggplot(data, aes(x=.data$x, y=.data$y)) +
theme_bw()+
theme(panel.grid.major = element_blank(), panel.grid.minor = element_blank())+
geom_ribbon(data=subset(dat1,times>times[1] & times<tm_new[1]),aes(x=.data$x,ymax=.data$y),ymin=0,alpha=0.3, fill="brown") +
geom_ribbon(data=subset(dat2,times>times[1] & times<tm_new[2]),aes(x=.data$x,ymax=.data$y),ymin=0,alpha=0.3, fill="green4") +
geom_ribbon(data=subset(dat3,times>times[1] & times<tm_new[3]),aes(x=.data$x,ymax=.data$y),ymin=0,alpha=0.3, fill="blue") +
geom_vline(xintercept = tm_new[1], size=.5, color="brown",linetype="dashed")+
geom_vline(xintercept = tm_new[2], size=.5, color="green4",linetype="dashed")+
geom_vline(xintercept = tm_new[3], size=.5, color="blue",linetype="dashed")+
geom_line(data =subset(data1,times>times[1] & times<tm_new[1]), color = "brown")+
geom_line(data =subset(data2,times>times[1] & times<tm_new[2]), color = "green4")+
geom_line(data =subset(data3,times>times[1] & times<tm_new[3]), color = "blue")+
labs(x = "Time",y="Abundance")+
theme(plot.title = element_text(size=40))+
theme(plot.title = element_text(hjust = 0.5))+
theme(axis.title.y = element_text(size = rel(1), angle = 90))+
theme(axis.title.x = element_text(size = rel(1), angle = 00))+
labs(tag = "(a)")
p2 <- ggplot(data, aes(x=.data$x, y=.data$y)) +
theme_bw()+
theme(panel.grid.major = element_blank(), panel.grid.minor = element_blank())+
geom_vline(xintercept = tm_new[1], size=.5, color="brown",linetype="dashed")+
geom_vline(xintercept = tm_new[2], size=.5, color="green4",linetype="dashed")+
geom_vline(xintercept = tm_new[3], size=.5, color="blue",linetype="dashed")+
geom_line(data =subset(da1,times>times[1] & times<tm_new[1]), color = "brown")+
geom_line(data =subset(da2,times>times[1] & times<tm_new[2]), color = "green4")+
geom_line(data =subset(da3,times>times[1] & times<tm_new[3]), color = "blue")+
labs(x = "Time",y="Temperature")+
theme(axis.title.y = element_text(size = rel(1), angle = 90))+
theme(axis.title.x = element_text(size = rel(1), angle = 00))+
labs(tag = "(b)")
plot_grid(p1, p2)
}else{
stop("The initial study temperature must be within the thermal tolerance range")
}
}else{
stop("The minimum critical temperature must be less than the maximum critical temperature")
}
}
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